View source for Compressed natural gas

{{Short description|Fuel gas mainly composed of methane}}
{{Use British English|date=February 2021}}
{{Redirect|CNG}}
{{distinguish|liquefied natural gas}}<!--As explained herein at [[#Comparison with other natural gas fuels]]-->
{{distinguish|text=[[autogas]] nor with [[gasoline]] (petrol)}}
'''Compressed natural gas''' ('''CNG''') is a [[fuel gas]] mainly composed of [[methane]] (CH<sub>4</sub>), [[Gas compression|compressed]] to less than 1% of the volume it occupies at [[standard atmospheric pressure]]. It is stored and distributed in hard containers at a pressure of {{Convert|20|-|25|MPa|psi+bar|}}, usually in [[Cylinder|cylindrical]] or [[Sphere|spherical]] shapes.

CNG is used in traditional petrol/[[internal combustion engine]] vehicles that have been modified, or in vehicles specifically manufactured for CNG use: either alone (dedicated), with a segregated liquid fuel system to extend range (dual fuel), or in conjunction with another fuel ([[Bi-fuel vehicle|bi-fuel]]). It can be used in place of [[gasoline|petrol]], [[diesel fuel]], and [[liquefied petroleum gas]] (LPG). CNG combustion produces fewer undesirable gases than the aforementioned fuels. In comparison to other fuels, [[natural gas]] poses less of a threat in the event of a [[Oil spill|spill]], because it is lighter than air and disperses quickly when released. [[Renewable natural gas|Biomethane]], [[biogas]] from [[anaerobic digestion]] or [[landfill]], can be used.

In response to high [[fuel]] prices and environmental concerns, CNG has been used in [[auto rickshaw]]s, [[pickup truck]]s, [[transit bus|transit]] and [[school bus]]es, and [[train]]s.

The cost and placement of fuel storage containers is the major barrier to wider/quicker adoption of CNG as a fuel. It is also why municipal government, public transportation vehicles were the most visible early adopters of it, as they can more quickly amortize the money invested in the new (and usually cheaper) fuel. In spite of these circumstances, the number of vehicles in the world using CNG has grown steadily (30 percent per year).<ref>{{Cite web |url=http://www.cgmum.co.in/GNC.pdf |title=Market Studies Series, GNC |publisher=Consulate of the Argentinian Republic, Mumbai, 2009, in Spanish |access-date=2011-01-03 |archive-date=2012-06-27 |archive-url=https://web.archive.org/web/20120627205348/http://www.cgmum.co.in/GNC.pdf |url-status=dead }}</ref> Now, as a result of the industry's steady growth, the cost of such fuel storage [[Gas cylinder|cylinders]] has been brought down to a much more acceptable level. Especially, for the [[Gas_cylinder#Types|CNG Type 1 and Type 2 cylinder]]s, many countries are able to make reliable and cost effective cylinders for conversion need.<ref>{{Cite web|url=http://www.zafirotech.net/index.php/road-transport/natural-gas-vehicle-cng/ |title= About natural gas vehicle (CNG as an auto fuel) | website = Zafiro Tech|access-date=2013-12-14 |url-status=dead |archive-url=https://web.archive.org/web/20131214180334/http://www.zafirotech.net/index.php/road-transport/natural-gas-vehicle-cng/ |archive-date=2013-12-14}}</ref>

==Energy density==
CNG's [[energy density]] is the same as [[liquefied natural gas]] at 53.6 MJ/kg. Its volumetric energy density, 9 MJ/L, is 42&thinsp;% of that of LNG (22 MJ/L) because it is not [[Liquefaction_of_gases|liquefied]], and is 25 percent that of [[Diesel fuel|diesel]] fuel.<ref>{{Cite web|url=http://www.envocare.co.uk/lpg_lng_cng.htm|title=Liquefied Petroleum Gas (LPG), Liquefied Natural Gas (LNG) and Compressed Natural Gas (CNG)|website=Envocare.co.uk|access-date=15 May 2015|archive-date=21 December 2019|archive-url=https://web.archive.org/web/20191221201123/http://www.envocare.co.uk/lpg_lng_cng.htm|url-status=live}}</ref>

== History ==
{{expand section|date=September 2021}}
Gases provided the original fuel for [[internal combustion engine]]s. The first experiments with compressed gases took place in France in the 1850s. Natural gas first became a transport fuel during World War I. In the 1960s, [[Columbia Natural Gas]] of Ohio tested a [[CNG carrier]]. The ship was to carry compressed natural gas in vertical pressure bottles; however, this design failed because of the high cost of the pressure vessels. Since then, there have been attempts at developing a commercially viable CNG carrier. Several competing CNG ocean transport designs have evolved. Each design proposes a unique approach to optimizing gas transport, while using as much off-the-shelf technology as possible, to keep costs competitive.

== Uses ==
=== Motor vehicles ===
[[File:Posto GNV 01 2009 485 CWB.jpg|thumb|CNG pumps at a Brazilian fueling station]]
{{Main|Natural gas vehicle}}
Worldwide, there were 14.8 million natural gas vehicles (NGVs) by 2011, with the largest numbers in [[Iran]] (4.07 million),<ref>{{Cite web |url=http://www.ngvjournal.com/?page_id=22218 |title=Worldwide NGV statistics |website=ngvjournal.com |access-date=2020-08-31 |archive-date=2021-04-14 |archive-url=https://web.archive.org/web/20210414094801/http://www.ngvjournal.com/?page_id=22218 |url-status=live }}</ref> [[Pakistan]] (2.85 million), [[Argentina]] (2.07 million), [[Brazil]] (1.7 million) and [[India]] (1.1 million),<ref name="ngvc.org">{{Cite web|url=http://www.ngvc.org/about_ngv/index.html|title=Facts about Natural Gas Vehicles|website=Ngvc.org|access-date=2016-07-17|archive-date=2014-03-28|archive-url=https://web.archive.org/web/20140328210057/http://www.ngvc.org/about_ngv/index.html|url-status=live}}</ref> with the Asia-Pacific region leading with 5.7 million NGVs, followed by Latin America with almost four million vehicles.<ref name=IANGV />

Several car and vehicle manufacturers, such as [[Fiat]], [[Opel]]/[[General Motors]], [[Peugeot]], [[Volkswagen]], [[Toyota]], [[Honda]], [[Maruti Suzuki]], [[Hyundai Motor Company|Hyundai]], [[Tata Motors]], and others, sell bi-fuel cars.In 1995, The [[Supreme Court of India]] decided that cars put into circulation after 1995 would have to run on unleaded fuel. At the beginning of 2005, 10,300 CNG busses and 20,000 CNG cars ran on Delhi’s roads.<ref>{{cite web | url=http://www.product-life.org/en/archive/cng-delhi | title=CNG Delhi – the world's cleanest public bus system running on CNG }}</ref> In 2006 [[Fiat Siena |Fiat Siena Tetrafuel]] was introduced in the Brazilian market, equipped with a 1.4-litre FIRE engine that runs on E100, E25 (Standard Brazilian Gasoline), Ethanol, and CNG.

Any existing petrol vehicle can be converted to a dual-fuel petrol/CNG vehicle. Authorized shops can do the retrofitting, which involves installing a CNG cylinder, plumbing, a CNG injection system, and electronics. The cost of installing a CNG conversion kit<ref>{{Cite web |url=http://weberautomotive.com/north-olmsted-cng-conversion-gmc-sierra/ |title=2003 GMC K1500 Sierra CNG Conversion in North Olmsted |website=Weberautomotive.com |date=2013-10-01 |access-date=2016-07-17 |archive-url=https://web.archive.org/web/20160323142059/http://weberautomotive.com/north-olmsted-cng-conversion-gmc-sierra/ |archive-date=2016-03-23 |url-status=dead }}</ref> can often reach $8,000 on passenger cars and light trucks, and is usually reserved for vehicles that travel many miles each year. CNG costs about 50% less than petrol, and emits up to 90% fewer emissions than petrol.<ref>{{Cite web|url=http://www.gas-south.com/business/compressed-natural-gas.aspx|title=Gas South: Compressed Natural Gas|website=www.gas-south.com|access-date=2016-03-31|archive-date=2019-12-21|archive-url=https://web.archive.org/web/20191221150906/https://www.gas-south.com/business/compressed-natural-gas.aspx|url-status=live}}</ref>

=== Locomotives ===
CNG locomotives are operated by several railroads. The [[Napa Valley Wine Train]] in the US successfully retrofitted a diesel locomotive to run on compressed natural gas before 2002.<ref>{{Cite news
| url=http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2002/11/22/NB43114.DTL
| title=Chugging along: After 13 years, Napa Valley Wine Train rolls to a profit - Jim Doyle - November 22, 2002
| access-date=2008-11-09
| work=The San Francisco Chronicle
| date=2002-11-22
| archive-date=2021-05-02
| archive-url=https://web.archive.org/web/20210502222557/https://www.sfgate.com/bayarea/article/Chugging-along-After-13-years-Napa-Valley-Wine-2715571.php
| url-status=live
}}</ref> This converted locomotive was upgraded to utilize a computer-controlled fuel injection system in May 2008, and is now the Napa Valley Wine Train's primary locomotive.<ref>
{{Cite web
| url=http://winetrain.com/news/node/4
| title=Napa Valley Wine Train Tests CNG Locomotive - Tech.Winetrain - May 15, 2008
| access-date=2008-08-20
| url-status=dead
| archive-url=https://web.archive.org/web/20090309134059/http://winetrain.com/news/node/4
| archive-date=2009-03-09
}}</ref> [[Ferrocarril Central Andino]] in Peru, has run a CNG locomotive on a freight line since 2005.<ref>{{Cite web
| url=http://www.treehugger.com/files/2005/06/the_first_cng_t.php
| title=The First CNG Train Starts Functioning in Peru - aula Alvarado - June 21, 2005
| access-date=2008-08-20
| archive-date=2009-03-05
| archive-url=https://web.archive.org/web/20090305140045/http://www.treehugger.com/files/2005/06/the_first_cng_t.php
| url-status=dead
}}</ref> CNG locomotives are usually [[diesel–electric transmission|diesel–electric]] locomotives that have been converted to use compressed natural gas generators instead of diesel generators to generate the electricity that drives the traction motors. Some CNG locomotives are able to selectively fire their cylinders only when there is a demand for power, which, theoretically, gives them a higher fuel-efficiency than conventional diesel engines. CNG is also cheaper than petrol or diesel fuel.{{CN|date=May 2023}}

===Natural gas transport===
{{main|CNG carrier}}
CNG is used to transport natural gas by sea for intermediate distances, using CNG carrier ships, especially when the infrastructure for pipelines or LNG is not in place.  At short distances, undersea pipelines are often more cost-effective, and for longer distances, [[LNG]] is often more cost-effective.

== Advantages ==
[[File:Emt-gas-2.jpg|thumb|right|A CNG-powered bus being refueled in Madrid, Spain.]]
* [[Natural gas vehicle]]s have lower maintenance costs than other hydrocarbon-fuel-powered vehicles.
* CNG fuel systems are sealed, preventing fuel losses from spills or evaporation.
* Increased life of lubricating oils, as CNG does not contaminate and dilute the crankcase oil.
* Being a gaseous fuel, CNG mixes easily and evenly in air.
* CNG is less likely to ignite on hot surfaces, since it has a high auto-ignition temperature (540&nbsp;°C), and a narrow range (5–15 percent) of [[flammability]].<ref name=GAIL>{{Cite web|url=http://www.gailonline.com/gailnewsite/businesses/citygasdistributionadvantage.html |title=GAIL |access-date=2009-10-25 |url-status=dead |archive-url=https://web.archive.org/web/20091231100505/http://gailonline.com/gailnewsite/businesses/citygasdistributionadvantage.html |archive-date=2009-12-31}}</ref>
* CNG-powered vehicles are considered to be safer than petrol-powered vehicles.<ref>{{Cite web|url=http://www.cleanvehicle.org/committee/technical/PDFs/Web-TC-TechBul2-Safety.pdf|title=How Safe are Natural Gas Vehicles?|publisher=Clean Vehicle Education Foundation|access-date=2008-05-08|url-status=dead|archive-url=https://web.archive.org/web/20080528041023/http://www.cleanvehicle.org/committee/technical/PDFs/Web-TC-TechBul2-Safety.pdf|archive-date=2008-05-28}}</ref><ref>{{Cite web|url=http://alternativefuels.about.com/od/naturalgaspropane/a/safenaturalgas.htm|title=How Safe is Natural Gas?|website=Alternativefuels.about.com|access-date=2008-05-08|archive-date=2016-09-18|archive-url=https://web.archive.org/web/20160918224004/http://alternativefuels.about.com/od/naturalgaspropane/a/safenaturalgas.htm|url-status=dead}}</ref><ref>{{Cite web|url=http://www.firetrainingresources.net/items/CNGAutoFire-FIREFIGHTERNEARMISScompressedpics.pdf|title=Fighting CNG fires|website=Firetrainingsources.net|access-date=2008-05-08|url-status=usurped|archive-url=https://web.archive.org/web/20080528041023/http://www.firetrainingresources.net/items/CNGAutoFire-FIREFIGHTERNEARMISScompressedpics.pdf|archive-date=2008-05-28}}</ref>
* ''Less pollution and more efficiency:''
** CNG emits significantly less pollution directly than petrol or oil when combusted (e.g., [[unburned hydrocarbon]]s (UHC), [[carbon monoxide]] (CO), [[nitrogen oxide]]s (NO<sub>X</sub>), [[sulfur oxide]]s (SO<sub>x</sub>) and PM ([[Atmospheric particulate matter|particulate matter]])). For example, an engine running on petrol for 100&nbsp;km produces 22&nbsp;kilograms of {{CO2}}, while covering the same distance on CNG emits only 16.3&nbsp;kilograms of {{CO2}}.<ref>{{Cite web|url=http://naturalgas.org/environment/naturalgas.asp |title=Archived copy |access-date=2012-11-25 |url-status=dead |archive-url=https://web.archive.org/web/20121117000137/http://www.naturalgas.org/environment/naturalgas.asp |archive-date=2012-11-17}}</ref>{{Better source needed|date=November 2015}}<!-- NatGas industry is not an independent source. Comparison depends on pollution standard -->
** The [[Life cycle assessment|lifecycle]] greenhouse gas emissions for CNG compressed from California's pipeline natural gas is given a value of 67.70&nbsp;grams of [[carbon dioxide equivalent|{{CO2}}-equivalent]] per [[megajoule]] (gCO<sub>2</sub>e/MJ) by CARB (the [[California Air Resources Board]]), approximately 28 percent lower than the average petrol fuel in that market (95.86 gCO<sub>2</sub>e/MJ).
** CNG produced from landfill biogas was found by CARB to have the lowest greenhouse gas emissions of any fuel analyzed, with a value of 11.26 gCO<sub>2</sub>e/MJ (more than 88 percent lower than conventional petrol) in the [[low-carbon fuel standard]] that went into effect on January 12, 2010.<ref>{{Cite web |url=http://www.arb.ca.gov/fuels/lcfs/121409lcfs_lutables.pdf |title=Table 6. Carbon Intensity Lookup Table for Gasoline and Fuels that Substitute for Gasoline. |website=Arb.ca.gov |access-date=2016-07-17 |archive-date=2017-11-20 |archive-url=https://web.archive.org/web/20171120105610/https://www.arb.ca.gov/fuels/lcfs/121409lcfs_lutables.pdf |url-status=dead }}</ref>
** Due to lower carbon dioxide emissions, switching to CNG can help mitigate [[greenhouse gas emission]]s.<ref name=GAIL /> However, natural gas leaks (both in the direct use and in the production and delivery of the fuel) represent an increase in greenhouse gas emissions. The ability of CNG to reduce greenhouse gas emissions over the entire fuel lifecycle will depend on the source of the natural gas and the fuel it is replacing.

== Drawbacks ==
Compressed natural gas vehicles require a greater amount of space for fuel storage than conventional petrol-powered vehicles. Since it is a compressed gas, rather than a liquid like petrol, CNG takes up more space for each GGE ([[petrol gallon equivalent]]). However, the cylinders used to store the CNG take up space in the trunk of a car or bed of a pickup truck that has been modified to additionally run on CNG. This problem is solved in factory-built CNG vehicles that install the cylinders under the body of the vehicle, leaving the trunk free, ''e.g.'', [[Fiat Multipla]], New [[Fiat Panda]], [[Volkswagen Touran]] Ecofuel, [[Volkswagen Caddy]] Ecofuel, Chevy Taxi, which sold in countries such as Peru. Another option is installation on roof (typical on buses), but this could require structural modifications. In 2014, a test (by the Danish Technological Institute) of [[Euro6]] heavy vehicles on CNG and diesel showed that CNG had higher fuel consumption, the same noise and production of CO<sub>2</sub> and particulates, but NO<sub>X</sub> emission was lower.<ref>Gravesen, Christian Hedegaard. "[http://www.trafikstyrelsen.dk/~/media/Dokumenter/06%20Center%20for%20groen%20transport/Publikationer/M%C3%A5leprogram%20for%20tunge%20CNG-k%C3%B8ret%C3%B8jer.ashx Måleprogram for tunge CNG-køretøjer] {{Webarchive|url=https://web.archive.org/web/20151117020802/http://www.trafikstyrelsen.dk/~/media/Dokumenter/06%20Center%20for%20groen%20transport/Publikationer/M%C3%A5leprogram%20for%20tunge%20CNG-k%C3%B8ret%C3%B8jer.ashx |date=2015-11-17 }}" page 58. EUDP journal: 64011-0330. ''Danish Technological Institute'', October 2015. Quote: "Energy consumption was generally higher on CNG"</ref>

Leakage of unburned methane as natural gas is a significant issue because methane, the primary component of natural gas, is a powerful, short-lived greenhouse gas.  It is more than 100 times more potent at trapping energy than carbon dioxide ({{CO2}}), the principal contributor to man-made climate change.

== Comparison with other natural gas fuels ==
Compressed natural gas is often confused with LNG ([[liquefied natural gas]]). Both are stored forms of natural gas. The main difference is that CNG is stored at ambient temperature and high pressure, while LNG is stored at low temperature and nearly ambient pressure. In their respective storage conditions, LNG is a [[liquid]] and CNG is a [[supercritical fluid]]. CNG has a lower cost of production and storage compared to LNG as it does not require an expensive cooling process and cryogenic tanks. However, CNG requires a much larger volume to store the energy equivalent of petrol and the use of very high pressures (3000 to 4000 psi, or 205 to 275 bar). As a consequence of this, LNG is often used for transporting natural gas over large distances, in ships, trains or pipelines, where the gas is converted into CNG before distribution to the end user.

Natural gas is being experimentally stored at lower pressure in a form known as an ANG ([[adsorbed natural gas]]) cylinder, where it is [[adsorbed]] at 35 bar (500 psi, the pressure of gas in natural gas pipelines) in various sponge-like materials, such as [[carbon]]<ref>{{Cite web|url=https://www.nsf.gov/news/news_summ.jsp?cntn_id=108390|title=nsf.gov&nbsp;– National Science Foundation (NSF) News&nbsp;– From Farm Waste to Fuel Tanks&nbsp;– US National Science Foundation (NSF)|website=Nsf.gov|access-date=15 May 2015|archive-date=8 August 2021|archive-url=https://web.archive.org/web/20210808000335/https://www.nsf.gov/news/news_summ.jsp?cntn_id=108390|url-status=live}}</ref> and MOFs ([[metal-organic framework]]s).<ref>{{Cite journal|title=Metal-Organic Framework from an Anthracene Derivative Containing Nanoscopic Cages Exhibiting High Methane Uptake |journal=Journal of the American Chemical Society |volume=130 |issue=3 |pages=1012–1016 |doi=10.1021/ja0771639 |pmid=18163628 |year = 2008|last1 = Ma|first1 = Shengqian|last2=Sun |first2=Daofeng |last3=Simmons |first3=Jason M. |last4=Collier |first4=Christopher D. |last5=Yuan |first5=Daqiang |last6=Zhou |first6=Hong-Cai|doi-access=free |bibcode=2008JAChS.130.1012M }}</ref> The fuel is stored at similar or greater energy density than CNG. This means that vehicles can be refueled from the natural gas network without extra gas compression, the fuel cylinders can be slimmed down and made of lighter, weaker materials.

It is possible to mix the ANG and CNG technology to reach an increased capacity of natural gas storage. In this process known as high pressure ANG, a high pressure CNG tank is filled by absorbers such as [[activated carbon]] (which is an adsorbent with high surface area) and stores natural gas by both CNG and ANG mechanisms.<ref>{{cite web |author=Peyman J |url=http://scopewe.com/adsorbed-natural-gas-ang |title=Adsorbed Natural Gas (ANG) – scopeWe – a Virtual Engineer |publisher=scopeWe |date= |access-date=2014-04-01 |archive-url=https://web.archive.org/web/20140324014700/http://scopewe.com/adsorbed-natural-gas-ang/ |archive-date=2014-03-24 |url-status=usurped }}</ref>

Compressed natural gas is sometimes mixed with hydrogen ([[HCNG]]), which increases the H/C ratio ([[hydrogen/carbon ratio]]) of the fuel and gives it a [[flame speed]] up to eight times higher than CNG.<ref>{{Cite web|url=http://www.doiserbia.nb.rs/img/doi/0354-9836/2011/0354-98361100044N.pdf |title=Hydrogen Enriched Compressed Natural Gas – A Futuristic Fuel for Internal Combustion Engines |website=Doiserbia.nb.rs |access-date=2016-07-17|url-status=dead |archive-url=https://web.archive.org/web/20160415001846/http://www.doiserbia.nb.rs/img/doi/0354-9836/2011/0354-98361100044N.pdf |archive-date=2016-04-15}}</ref>

== Codes and standards ==
The lack of harmonized codes and standards across international jurisdictions is an additional barrier to NGV market penetration.<ref name="oee.nrcan.gc.ca">{{Cite web |url=http://oee.nrcan.gc.ca/sites/oee.nrcan.gc.ca/files/pdf/transportation/alternative-fuels/resources/pdf/roadmap.pdf |title=Natural Gas Use in the Canadian Transportation Sector |website=Oee.nrcan.gc.ca |access-date=2016-07-17 |archive-date=2013-10-17 |archive-url=https://web.archive.org/web/20131017085633/http://oee.nrcan.gc.ca/sites/oee.nrcan.gc.ca/files/pdf/transportation/alternative-fuels/resources/pdf/roadmap.pdf |url-status=dead }}</ref> The International Organization for Standardization has an active technical committee working on a standard for natural gas fuelling stations for vehicles.<ref>{{Cite web|url=http://www.iso.org/iso/home/standards_development/list_of_iso_technical_committees/iso_technical_committee.htm?commid=606615|title=ISO&nbsp;– Technical committees&nbsp;– ISO/PC 252&nbsp;– Natural gas fuelling stations for vehicles|website=Iso.org|access-date=15 May 2015|archive-date=18 May 2015|archive-url=https://web.archive.org/web/20150518090425/http://www.iso.org/iso/home/standards_development/list_of_iso_technical_committees/iso_technical_committee.htm?commid=606615|url-status=live}}</ref>

Despite the lack of harmonized international codes, natural gas vehicles have an excellent global safety record. Existing international standards include ISO 14469-2:2007 which applies to CNG vehicle nozzles and receptacle<ref>{{Cite web |title=ISO 14469-2:2007&nbsp;– Road vehicles&nbsp;– Compressed natural gas (CNG) refuelling connector&nbsp;– Part 2: 20 MPa (200 bar) connector, size 2 |website=Iso.org |year=2007 |url=http://www.iso.org/iso/home/store/catalogue_tc/catalogue_detail.htm?csnumber=37253 |access-date=15 May 2015 |archive-date=18 May 2015 |archive-url=https://web.archive.org/web/20150518090418/http://www.iso.org/iso/home/store/catalogue_tc/catalogue_detail.htm?csnumber=37253 |url-status=live }}</ref> and ISO 15500-9:2012 specifies tests and requirements for the pressure regulator.<ref>{{Cite web |title=ISO 15500-9:2012&nbsp;– Road vehicles&nbsp;– Compressed natural gas (CNG) fuel system components&nbsp;– Part 9: Pressure regulator |website=Iso.org |year=2012 |url=http://www.iso.org/iso/home/store/catalogue_tc/catalogue_detail.htm?csnumber=51561 |access-date=15 May 2015 |archive-date=18 May 2015 |archive-url=https://web.archive.org/web/20150518090411/http://www.iso.org/iso/home/store/catalogue_tc/catalogue_detail.htm?csnumber=51561 |url-status=live }}</ref>

The [[National Fire Protection Association]]'s NFPA 52 code covers natural gas vehicle safety standards in the United States.

==Worldwide adoption==
{{Update section|date=March 2019}}

{| class="wikitable" style="float:right; margin-left:5px;"
! colspan=6| '''Top ten countries<br />with the largest NGV vehicle fleets&nbsp;– 2013<ref>{{Cite web |title=NGV Market Growth 2013 Analysis |work=Wuxi Banner Vessel |access-date=15 May 2015 |url= http://www.cng-tank.com/index.php/ngv-market-growth-2013-analysis/ |url-status=dead |archive-url= https://web.archive.org/web/20140107014904/http://www.cng-tank.com/index.php/ngv-market-growth-2013-analysis/ |archive-date=7 January 2014}}</ref><ref>{{Cite web |title=ASIAN NGV COMMUNICATIONS |publisher=NGV Journal |year=2011 |url=http://www.ngvjournal.com/en/magazines/asian-ngv-communications |access-date=2014-01-07 |url-status=dead |archive-url= https://web.archive.org/web/20130809204754/http://www.ngvjournal.com/en/magazines/asian-ngv-communications |archive-date=2013-08-09}}</ref>'''<br /><small>(millions)</small>
|-
!Rank || Country || Registered<br />fleet || Rank || Country || Registered<br />fleet
|-
|ALIGN=CENTER| 1 ||{{Flag|Iran}} ||ALIGN=RIGHT| 3.50 ||ALIGN=CENTER| 6 || {{Flag|Italy}} ||ALIGN=RIGHT| 0.82
|-
|ALIGN=CENTER| 2 ||{{Flag|Pakistan}} ||ALIGN=RIGHT| 2.79 ||ALIGN=CENTER| 7  || {{Flag|Colombia}} ||ALIGN=RIGHT| 0.46
|-
|ALIGN=CENTER| 3 ||{{Flag|Argentina}} ||ALIGN=RIGHT| 2.28 ||ALIGN=CENTER| 8|| {{Flag|Uzbekistan}} ||ALIGN=RIGHT| 0.45
|-
|ALIGN=CENTER| 4 ||{{Flag|Brazil}} ||ALIGN=RIGHT| 1.75 ||ALIGN=CENTER| 9 || {{Flag|Thailand}} ||ALIGN=RIGHT| 0.42
|-
|ALIGN=CENTER| 5 ||{{Flag|China}} ||ALIGN=RIGHT| 1.58 ||ALIGN=CENTER| 10|| {{Flag|Indonesia}} ||ALIGN=RIGHT| 0.38
|-
! colspan="6"| World Total = 18.09 million NGV vehicles
|}
[[Iran]], [[Pakistan]], [[Argentina]], [[Brazil]] and [[China]] have the highest number of CNG run vehicles in the world.<ref name="ngvc.org" />

[[Natural gas vehicle]]s are increasingly used in Iran, Pakistan,<ref name="highest">{{Cite news |author=Mumtaz Alvi |title=Pakistan has highest number of CNG vehicles: survey |url=http://www.thenews.com.pk/TodaysPrintDetail.aspx?ID=6463&Cat=13 |website=The News |location=Pakistan |date=2011-06-03 |access-date=2012-01-01 |archive-date=2012-03-02 |archive-url=https://web.archive.org/web/20120302192527/http://www.thenews.com.pk/TodaysPrintDetail.aspx?ID=6463&Cat=13 |url-status=live }}</ref> the [[Asia-Pacific]] region, the Indian capital of [[Delhi]], and other large cities such as [[Ahmedabad]], [[Mumbai]], [[Pune]], and [[Kolkata]], as well as cities such as [[Lucknow]], [[Kanpur]], [[Varanasi]], and others.

Its use is also increasing in [[South America]], [[Europe]], and [[North America]], because of rising petrol prices.<ref name="IANGV">{{Cite web |url=http://www.iangv.org/tools-resources/statistics.html |title=Natural Gas Vehicle Statistics: NGV Count - Ranked Numerically as at December 2009 |publisher=International Association for Natural Gas Vehicles |access-date=2010-04-27 |url-status=usurped |archive-url= https://web.archive.org/web/20100110101111/http://www.iangv.org/tools-resources/statistics.html |archive-date=2010-01-10}}</ref>

=== Africa ===
[[Egypt]] is amongst the top 10 countries in CNG adoption, with 128,754 CNG vehicles and 124 CNG fueling stations. Egypt was also the first nation in Africa and the Middle East to open a public CNG fueling station in January 1996.<ref>{{Cite news|title=New fuel cleans up: CNG: Compressed natural gas is rapidly gaining popularity with drivers; Surveys edition|author=Allen, Robin|newspaper=Financial Times|date=1999-05-11|page=17}}</ref>

The vast majority (780,000) have been produced as dual fuel-vehicles by the auto manufacturer in the last two years, and the remainder have been converted utilizing after market conversion kits in workshops. There are 750 active refueling stations country wide with an additional 660 refueling stations under construction and expected to come on stream. Currently the major problem facing the industry as a whole is the building of refueling stations that is lagging behind dual fuel vehicle production, forcing many to use petrol instead.

[[Nigeria]] CNG started with a pilot project in [[Benin City]] [[Edo State]] in 2010 by [[NIPCO Gas Limited]]. [[NIPCO Gas Limited]] is a 100% subsidiary of [[NIPCO PLC]]. As of June 2020, seven CNG stations have been built in Benin City [[Edo State]], with about 7,500 cars running on CNG in Benin City [[Edo state]]. In Benin City [[Edo state]], major companies such as [[Coca-Cola]], [[7up]], [[Yongxing Steel]] are using CNG to power their fork-lifts/trucks while Edo City Transport Ltd (ECTS) is also running some of its buses on CNG. [[Kwale, Nigeria]] CNG stations were inaugurated by Mr. Abhishek Sharma, the head of marketing (Natural Gas) from [[NIPCO Gas Limited]] in 2019.
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=== Asia ===
[[File:Hino 510 ngv.jpg|thumb|right|A CNG powered [[Hino Motors|Hino]] bus, operated by [[Bangkok Mass Transit Authority|BMTA]] in [[Thailand]].]]

====China====
[[File:Jinghua BK6111BCNG 67231@68 (20051203153017).JPG|thumb|left|A CNG powered bus in Beijing. CNG buses in Beijing were introduced in late 1998.]]
In [[China]], companies such as [[Sino-Energy]] are active in expanding the footprint of CNG filling stations in medium-size cities across the interior of the country, where at least two natural gas pipelines are operational.{{Citation needed|date=August 2009}}












====Vietnam====
In [[Vietnam]], the compressed natural gas (CNG) market is developing, driven by the demand for cleaner energy and domestic natural gas supply. Companies such as [[PV GAS CNG]] (a subsidiary of [[Vietnam Oil and Gas Group]]), [[Gas South]], and [[CNG Vietnam]] are key suppliers, building transportation and distribution infrastructure for CNG to serve industrial and transportation sectors.
[[File:CNG station in Vietnam (CNG PRU system) by Phuc Sang Minh Gas.jpg|thumb|CNG station in Vietnam (CNG PRU system) by Phuc Sang Minh Gas]]
Additionally, **Phuc Sang Minh Gas (JPS Gas)**, with its website at [https://jpsgas.com.vn/](https://jpsgas.com.vn/), is also an experienced player in the gas supply industry in Vietnam, including compressed natural gas (CNG), liquefied petroleum gas (LPG), and liquefied natural gas (LNG). The company has been operating since 2006 and contributes to the growth of the domestic gas market. Their turnkey solutions have made them the number one provider of comprehensive LPG, CNG, and LNG solutions in Vietnam.

====Malaysia====
In [[Malaysia]], the use of CNG was originally introduced for taxicabs and airport limousines during the late 1990s, when new taxis were launched with CNG engines while taxicab operators were encouraged to send in existing taxis for full engine conversions. The practice of using CNG remained largely confined to taxicabs predominately in the [[Klang Valley]] and [[Penang]] due to a lack of interest. No incentives were offered for those besides taxicab owners to use CNG engines, while government subsidies on petrol and diesel made conventional road vehicles cheaper to use in the eyes of the consumers. [[Petronas]], Malaysia's state-owned oil company, also monopolises the provision of CNG to road users. As of July 2008, Petronas only operates about 150 CNG refueling stations, most of which are concentrated in the Klang Valley. At the same time, another 50 were expected by the end of 2008.<ref name="MY CNG station no">{{Cite news |url=http://thestar.com.my/metro/story.asp?file=/2008/6/13/central/21532536 |title=More natural gas stations needed, say motorists |newspaper=[[The Star (Malaysia)|The Star Online]] |date=2008-06-13 |access-date=2008-08-04 |url-status=dead |archive-url=https://web.archive.org/web/20110521140522/http://thestar.com.my/metro/story.asp?file=%2F2008%2F6%2F13%2Fcentral%2F21532536 |archive-date=2011-05-21}}</ref>

As [[fuel subsidies]] were gradually removed in Malaysia starting June 5, 2008, the subsequent 41 percent price hike on petrol and diesel fuel led to a 500 percent increase in the number of new CNG cylinders installed.<ref name="MY rush 1">{{cite news |url=http://thestar.com.my/news/story.asp?file=/2008/6/8/focus/21482211 |title=Motorists rush to check out NGV system |author=Rashvinjeet S. Bedi |newspaper=The Star Online |date=2008-06-08 |access-date=2008-08-04 |url-status=dead |archive-url=https://web.archive.org/web/20110521140559/http://thestar.com.my/news/story.asp?file=%2F2008%2F6%2F8%2Ffocus%2F21482211 |archive-date=2011-05-21}}</ref><ref name="MY rush 2">{{cite news |url=http://thestar.com.my/metro/story.asp?file=/2008/6/25/north/21635112 |title=Long queue for NGV kits |author=Vinesh, Derrick |newspaper=The Star Online |date=2008-06-25 |access-date=2008-08-04 |url-status=dead |archive-url=https://web.archive.org/web/20110521140624/http://thestar.com.my/metro/story.asp?file=%2F2008%2F6%2F25%2Fnorth%2F21635112 |archive-date=2011-05-21}}</ref> National car maker [[Proton (carmaker)|Proton]] considered fitting its [[Proton Waja|Waja]], [[Proton Saga|Saga]] and [[Proton Persona|Persona]] models with CNG kits from Prins Autogassystemen by the end of 2008,<ref name="MY Potong CNG">{{cite news|url=http://thestar.com.my/news/story.asp?file=/2008/6/28/nation/21685753|title=Proton cars to come with NGV kits|newspaper=The Star Online|date=2008-06-28|access-date=2008-08-04|url-status=dead|archive-url=https://web.archive.org/web/20110521140638/http://thestar.com.my/news/story.asp?file=%2F2008%2F6%2F28%2Fnation%2F21685753|archive-date=2011-05-21}}</ref> while a local distributor of locally assembled [[Hyundai Motor Company|Hyundai]] cars offers new models with CNG kits.<ref name="MY Hyundai">{{cite news |url=http://biz.thestar.com.my/news/story.asp?file=/2008/7/7/business/21712982 |title=Moving towards hybrid vehicles |author=Elaine Ang and Leong Hung Yee |newspaper=The Star Online |date=2008-07-07 |access-date=2008-08-04 |archive-date=2011-05-22 |archive-url=https://web.archive.org/web/20110522062607/http://biz.thestar.com.my/news/story.asp?file=/2008/7/7/business/21712982 |url-status=live }}</ref> Conversion centres, which also benefited from the rush for lower running costs, also perform partial conversions to existing road vehicles, allowing them to run on both petrol or diesel and CNG with a cost varying between RM3,500 to RM5,000 for passenger cars.<ref name="MY rush 1" /><ref name="MY CNG conversion">{{cite news |url=http://thestar.com.my/metro/story.asp?file=/2008/6/13/central/21532553 |title=Rush to fit natural gas gadget |author=Perumal, Elan |newspaper=The Star Online |date=2008-06-13 |access-date=2008-08-04 |url-status=dead |archive-url=https://web.archive.org/web/20110521140707/http://thestar.com.my/metro/story.asp?file=%2F2008%2F6%2F13%2Fcentral%2F21532553 |archive-date=2011-05-21}}</ref>

====Myanmar====
The Ministry of Transport of [[Myanmar]] passed a law in 2005 which required that all public transport vehicles&nbsp;– buses, trucks and taxis, be converted to run on CNG. The Government permitted several private companies to handle the conversion of existing diesel and petrol cars, and also to begin importing CNG variants of buses and taxis. Accidents and rumours of accidents, partly fueled by Myanmar's position in local hydrocarbon politics,<ref>{{Cite web|url=http://www.irrawaddy.org/highlight.php?art_id%3D14444 |title=Rangoon Commuters Afraid of Gas Explosions |access-date=2008-09-20 |url-status=dead |archive-url=https://web.archive.org/web/20110501123123/http://www.irrawaddy.org/highlight.php?art_id=14444 |archive-date=2011-05-01}}</ref> has discouraged citizens from using CNG vehicles, although now almost every taxi and public bus in Yangon, Myanmar's largest city, run on CNG. CNG stations have been set up around Yangon and other cities, but electricity shortages mean that vehicles may have to queue up for hours to fill their gas containers.<ref>{{Cite web |url=http://english.people.com.cn/200702/06/eng20070206_347894.html |title=People's Daily Online&nbsp;– Over 10,000 motor vehicles converted into CNG-run in previous Myanmar capital |website=English.people.com.cn |date=2007-02-06 |access-date=2016-07-17 |archive-date=2013-05-12 |archive-url=https://web.archive.org/web/20130512134346/http://english.people.com.cn/200702/06/eng20070206_347894.html |url-status=live }}</ref> The Burmese opposition movements are against the conversion to CNG, as they accuse the companies of being proxies of the junta, and also their desire that the petrodollars earned by the regime should go towards the defense sector rather than towards improving the infrastructure or welfare of the people.

==== India ====
In [[Indian National Congress|India]], there are over 4500 CNG Stations all over the country now as compared to 2014 when the country only had about 900 CNG Stations. The government is aiming to increase the use of CNG powered vehicles by setting up more CNG stations in the country, the aim is to increase the current number to 8000 CNG Stations in the next two years.<ref>{{Cite web |last=www.ETEnergyworld.com |title=India to set up 3,500 CNG stations in two years: Oil minister Hardeep Puri - ET EnergyWorld |url=https://energy.economictimes.indiatimes.com/news/oil-and-gas/india-to-set-up-3500-cng-stations-in-two-years-oil-minister-hardeep-puri/92903767 |access-date=2023-08-29 |website=ETEnergyworld.com |language=en}}</ref><ref>{{Cite web |last= |date=2023-08-29 |title=Planetrdp |url=https://planetrdp.com/rising-number-of-cng-stations-in-india-leading-to-greener-future/ |access-date=2023-08-29 |website=PlanetRDP |language=en-US}}</ref>

As of December 2022, the state of [[Gujarat]] has the highest number of CNG Pumps in the country followed by [[Uttar Pradesh]] being the second highest and with [[Maharashtra]] falling little behind the above regions.<ref>{{Cite web |title=India: number of CNG stations by state 2022 |url=https://www.statista.com/statistics/941227/india-number-of-cng-stations-by-state/ |access-date=2023-08-29 |website=Statista |language=en}}</ref>

====Pakistan====
In [[Pakistan]], the Karachi government under the order of the [[Supreme court|Supreme Court]] in 2004 made it mandatory for all city buses and [[auto rickshaws]] to run on CNG with the intention of reducing air pollution.

In 2012, the federal government announced plans to gradually phase out CNG over a period of approximately three years given natural gas shortages which have been negatively affecting the manufacturing sector.<ref>{{Cite web|url=http://www.thenews.com.pk/Todays-News-2-124002-Plan-to-close-down-CNG-sector-raises-eyebrows|title=Plan to close down CNG sector raises eyebrows|date=1 August 2012|work=The News International, Pakistan|access-date=15 May 2015|archive-date=18 May 2015|archive-url=https://web.archive.org/web/20150518094453/http://www.thenews.com.pk/Todays-News-2-124002-Plan-to-close-down-CNG-sector-raises-eyebrows|url-status=live}}</ref> Aside from limiting electricity generation capacity, gas shortages in Pakistan have also raised the costs of business for key industries including the fertilizer, cement and textile sectors.<ref>{{Cite web|url=http://www.thenews.com.pk/article-61285-CNG-stations-to-be-phased-out:-Dr-Asim|title=CNG stations to be phased out: Dr Asim|date=30 July 2012|work=The News International, Pakistan|access-date=15 May 2015|archive-date=18 May 2015|archive-url=https://web.archive.org/web/20150518094451/http://www.thenews.com.pk/article-61285-CNG-stations-to-be-phased-out:-Dr-Asim|url-status=live}}</ref>

====Singapore====
[[File:Volvo B10BLE SBS Transit SBS2998J.jpg|thumb|right|A retired CNG powered [[Volvo B10BLE]] bus, operated by [[SBS Transit]] in [[Singapore]].]]
In Singapore, CNG was once used by public transport vehicles like buses and taxis, as well as goods vehicles until 2018. During its heyday in 2008 onwards, more owners of private cars had sought interest in converting their petrol-driven vehicles to also run on CNG &ndash; due to rising petrol prices. The initial cost of converting a regular vehicle to dual fuel at the German conversion workshop of C. Melchers, for example, is around S$3,800; with the promise of real cost-savings that [[dual-fuel vehicle]]s bring over the long term.

Singapore currently has five operating filling stations for natural gas. [[Sembcorp]] Gas Pte Ltd. runs the station on Jurong Island and, jointly with [[Singapore Petroleum Company]], the filling station at Jalan Buroh. Both these stations are in the western part of the country. Another station on the mainland is in [[Mandai]] Link to the north and is operated by SMART Energy. SMART also own a second station on Serangoon North Ave 5 which was set up end of March 2009; The fifth and largest station in the world, located in Toh Tuck, was opened by the UNION Group in September 2009. This station is recognized by the Guniness World Records as being the largest in the world with 46 refuelling hoses. The Union Group, which operates 1000 CNG Toyota Wish taxis then planned to introduce another three daughter stations and increase the CNG taxi fleet to 8000 units.

As a key incentive for using this eco-friendly fuel Singapore has a green vehicle rebate for users of CNG technology. First introduced in January 2001, the GVR grants a 40 percent discount on the OMV (open market value) cost of newly registered green passenger vehicles. This initiative will end at the end of 2012 as the government believes the 'critical mass' of CNG vehicles would then have been built up.

Due to reliability issues and lower ranges that CNG provided (as cited by users’ feedback), refueling stations mostly concentrated in the western end of Singapore, the rising demand of greener solutions like hybrid technologies, led to its demise where both public buses and the last CNG taxis were on its way to being scrapped in 2018.<ref>{{cite web |title=Last of compressed natural gas taxis scrapped; CNG cars' days also numbered |url=https://www.straitstimes.com/singapore/transport/last-of-compressed-natural-gas-taxis-scrapped-cng-cars-days-also-numbered |website=The Straits Times |date=28 January 2018 |access-date=13 September 2021 |archive-date=13 September 2021 |archive-url=https://web.archive.org/web/20210913185232/https://www.straitstimes.com/singapore/transport/last-of-compressed-natural-gas-taxis-scrapped-cng-cars-days-also-numbered |url-status=live }}</ref> 
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=== Europe ===
[[File:Brescia Trasporti Irisbus CityClass 663 Desenzano 20120618.JPG|thumb|right|CNG powered bus in Italy]]
In [[Italy]], there are more than 1173 CNG stations.<ref>{{Cite web |url=http://www.metanoauto.com/modules.php?name=Elenco_Distributori |title=Dal 2005 la comunità italiana del metano per auto |language=it |website=Metanoauto.com |access-date=2016-07-17 |archive-date=2016-03-05 |archive-url=https://web.archive.org/web/20160305073116/http://www.metanoauto.com/modules.php?name=elenco_distributori |url-status=live }}</ref> The use of methane for vehicles, started in the 1930s and has continued off and on until today. Since 2008 there have been a large market expansion for natural gas vehicles (CNG and LPG) caused by the rise of petrol prices and by the need to reduce air pollution emissions.<ref>{{Cite web|url=http://www.euromobility.org/documenti/strumenti/Benefici_metano.pdf |title=Archived copy |access-date=2011-04-17 |url-status=dead |archive-url=https://web.archive.org/web/20120322203818/http://www.euromobility.org/documenti/strumenti/Benefici_metano.pdf |archive-date=2012-03-22}}</ref> Before 1995 the only way to have a CNG-powered car was by having it retrofitted with an after-market kit. A large producer was [[Landi Renzo]], Tartarini Auto, Prins Autogassystemen, OMVL, BiGAs,... and AeB for electronic parts used by the most part of kit producer. Landi Renzo and Tartarini selling vehicles in Asia and South America. After 1995 bi-fuel cars (petrol/CNG) became available from several major manufacturers. Currently [[Fiat]], [[Opel]], [[Volkswagen]], [[Citroën]], [[Renault]], [[Volvo]] and [[Mercedes-Benz|Mercedes]] sell various car models and small trucks that are petrol/CNG powered. Usually CNG parts used by major car manufacturers are actually produced by [[automotive aftermarket]] kit manufacturers, e.g. Fiat use Tartarini Auto components, Volkswagen use Teleflex GFI<ref>{{Cite web|url=http://www.teleflexpower.com/af_about.php |title=Teleflex GFI |access-date=2008-08-01 |url-status=dead |archive-url=https://web.archive.org/web/20080803000436/http://www.teleflexpower.com/af_about.php |archive-date=2008-08-03}}</ref> and Landi Renzo components.

In [[Belgium]], CNG is a very new fuel. At the beginning of 2014 there were only 17 refuelling stations, all of them in [[Flanders]], but the number is now increasing rapidly. At the beginning of 2015 there were 29 refueling stations in Belgium, all of them in Flanders.{{Citation needed|date=November 2014}} As of January 2017, there are 76 active refueling stations in Belgium, most of them being in Flanders since only 7 of them are in [[Wallonia]] or [[Brussels Capital Region|Brussels]].<ref>{{Cite web |url=https://customer.dats24.be/sites/default/files/D24_fiche_fr.pdf |title=Faire le plein de CNG |website=dats24.be |date=2017-01-07 |access-date=2017-01-16 |archive-url=https://web.archive.org/web/20170905191212/https://customer.dats24.be/sites/default/files/D24_fiche_fr.pdf |archive-date=2017-09-05 |url-status=dead }}</ref> As a fuel and compared to petrol, CNG has an advantageous fiscal treatment with lower excises duties (although VAT is always paid). Since CNG, as a car fuel, is not totally exempted of excise duties, CNG cars do not pay a prime road tax to partially compensate the State for the loss of revenue. Instead LPG cars pay a prime road tax in Belgium, because LPG is totally exempted from excise duties. Since CNG is not totally exempted of excise duties, in Belgium it is allowed to connect a car to the home network of natural gas and to refuel the car from home. The purchase of CNG cars is not subsidised by the government, but by the Belgian producers and distributors of natural gas. Fiat and Volkswagen sell factory-equipped CNG-cars in Belgium. At the end of 2018 there were 11,188 vehicles running with CNG in Belgium.<ref>{{Cite web|url=https://mobilit.belgium.be/sites/default/files/kerncijfers_mobiliteit_2018.pdf|title=Kerncijfers Mobiliteit 2018|website=FOD Mobiliteit|page=9|access-date=2020-01-11|archive-date=2020-01-11|archive-url=https://web.archive.org/web/20200111133659/https://mobilit.belgium.be/sites/default/files/kerncijfers_mobiliteit_2018.pdf|url-status=live}}</ref>
[[File:Stadtbus Nürnberg Bus 553 Btf. Fürth.jpg|thumb|left|CNG powered bus in Germany]]
In [[Germany]], CNG-generated vehicles are expected to increase to two million units of motor-transport by 2020. The cost for CNG fuel is between 1/3 and 1/2 compared to other [[fossil fuels]] in Europe.{{Citation needed|date=October 2007}} In 2016 there are around 900 CNG stations in Germany<ref>{{Cite web |url=http://www.gibgas.de/Tankstellen/Europainfos/Deutschland |title=gibgas – Erdgasfahrzeuge, Erdgastankstellen, www.gibgas.de – Das Erdgasfahrzeug-Portal |website=Gibgas.de |date=2014-01-07 |access-date=2016-07-17 |archive-date=2016-07-14 |archive-url=https://web.archive.org/web/20160714214632/http://www.gibgas.de/Tankstellen/Europainfos/Deutschland |url-status=live }}</ref> and major German car manufacturers like Volkswagen, Mercedes, Opel, Audi offer CNG engines on most of their models. Augsburg is one of the few cities that only run CNG operated public buses since 2011.<ref>{{Cite web |url=http://www.b4bschwaben.de/nachrichten/augsburg_artikel,-swa-investierten-52-Millionen-Euro-in-13-neue-Erdgasbusse-_arid,152276.html |title=swa investierten 5,2 Millionen Euro in 13 neue Erdgasbusse – Augsburg – B4B SCHWABEN |website=B4bschwaben.de |date=2015-12-21 |access-date=2016-07-17 |archive-date=2016-01-21 |archive-url=https://web.archive.org/web/20160121061340/http://www.b4bschwaben.de/nachrichten/augsburg_artikel,-swa-investierten-52-Millionen-Euro-in-13-neue-Erdgasbusse-_arid,152276.html |url-status=live }}</ref>

In [[Turkey]], [[Ankara]] municipality is increasingly using CNG buses, where numbers have reached 1090 by 2011.<ref>{{Cite web|url=http://www.bus-planet.com/bus/bus-europe/Turkey-site/Ankara-EBO/index.html|title=Ankara, EGO|website=Bus-planet.com|access-date=15 May 2015|archive-date=18 May 2015|archive-url=https://web.archive.org/web/20150518080454/http://www.bus-planet.com/bus/bus-europe/Turkey-site/Ankara-EBO/index.html|url-status=live}}</ref> [[Istanbul]] has started in 2014 with an order of 110 buses.<ref>{{Cite web |url=http://www.ngvjournal.com/turkey-temsa-delivers-110-new-natural-gas-buses-to-istanbul-otobus/ |title=Turkey: TEMSA delivers 110 new natural gas buses to Istanbul Otobüs |publisher=NGV Journal |access-date=2016-07-17 }}{{Dead link|date=November 2019 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> [[Konya]] also added 60 buses to its fleet the same year.<ref>{{Cite web |url=http://www.ngvglobal.com/blog/konya-metro-adds-60-cng-powered-tcv-karat-buses-0429 |title=Konya Metro Adds 60 CNG-Powered TCV Karat Buses |publisher=NGV Global |date=2014-04-29 |access-date=2016-07-17 |archive-date=2016-01-08 |archive-url=https://web.archive.org/web/20160108100800/http://www.ngvglobal.com/blog/konya-metro-adds-60-cng-powered-tcv-karat-buses-0429 |url-status=usurped }}</ref><ref>{{Cite web |url=http://wire.seenews.com/news/turkeys-bozankaya-supplies-60-buses-to-konya-municipality-405442 |title=Turkey's Bozankaya supplies 60 buses to Konya municipality – SeeNews – Business intelligence for Southeast Europe |website=Wire.seenews.com |date=2014-02-18 |access-date=2016-07-17 |archive-date=2016-01-08 |archive-url=https://web.archive.org/web/20160108100800/http://wire.seenews.com/news/turkeys-bozankaya-supplies-60-buses-to-konya-municipality-405442 |url-status=live }}</ref>

In [[Portugal]], there are 9 CNG refueling stations as of September 25, 2017.<ref>{{Cite web |url=http://cngeurope.com/countries/portugal/ |title=CNG Europe – Portugal |website=cngeurope.com |date=31 August 2015 |access-date=2017-07-25 |archive-date=2017-08-12 |archive-url=https://web.archive.org/web/20170812080435/http://cngeurope.com/countries/portugal/ |url-status=live }}</ref>

In [[Hungary]], there are four public CNG refueling stations in the cities [[Budapest]], [[Szeged]], [[Pécs]] and [[Győr]]. The public transportation company of [[Szeged]], [[Szolnok]] and some [[List of districts in Budapest|districts]] in [[Budapest]] runs buses mainly on CNG.<ref>{{Cite web |title=Közösen, zölden |url=https://zold.volanbusz.hu/hu |access-date=2023-07-12 |website=Volánbusz |language=hu}}</ref>

In [[Bulgaria]], there are 96 CNG refueling stations as of July 2011. One can be found in most of Bulgaria's big towns.<ref>{{Cite web|url=http://remixbg.com/station-en.html|title=Remix Bulgaria Ltd – exclusive representative of the Italian companies SICOM and BRC, methane stations, producing full range of stations, building and putting in operation of methane stations|website=Remixbg.com|access-date=15 May 2015|archive-date=5 May 2015|archive-url=https://web.archive.org/web/20150505005626/http://remixbg.com/station-en.html|url-status=live}}</ref> In the capital [[Sofia]] there are 22 CNG stations making it possibly the city with the most publicly available CNG stations in Europe. There are also quite a few in [[Plovdiv]], [[Ruse, Bulgaria|Ruse]], [[Stara Zagora]] and [[Veliko Tarnovo]] as well as in the towns on the Black Sea – [[Varna, Bulgaria|Varna]], [[Burgas]], [[Nesebar]] and [[Kavarna]]. CNG vehicles are becoming more and more popular in the country. The fuel is mostly used by taxi drivers because of its much lower price compared to petrol. Currently (as of July, 2015) the city of Sofia is rapidly renewing its public transport fleet with [[MAN Lion's City]] buses running on CNG.<ref>{{Cite web|title=Bulgaria: MAN wins tender to deliver 126 CNG buses to Sofia transit agency {{!}} NGV Journal|url=http://www.backup.ngvjournal.com/bulgaria-man-wins-tender-to-deliver-126-cng-buses-to-sofia-transit-agency/|website=www.backup.ngvjournal.com|date=5 March 2014|access-date=2015-06-30|archive-date=2020-04-17|archive-url=https://web.archive.org/web/20200417102508/http://www.backup.ngvjournal.com/bulgaria-man-wins-tender-to-deliver-126-cng-buses-to-sofia-transit-agency/|url-status=live}}</ref> Also, many companies switch to CNG cargo vans and even heavy trucks for their daily operations within city limits.

In [[North Macedonia]], there is one CNG station located in the capital Skopje, but it is not for public use. Only twenty buses of the local Public Transport Company have been fitted to use a mixture of diesel and CNG. The first commercial CNG station in Skopje is in the advanced stage of development and was expected to start operation in July 2011.{{Citation needed|date=February 2013}}

In [[Serbia]], there are about 20 public CNG refuelling stations as of August 2019. Four in the capital [[Belgrade]], and the rest in the towns of [[Subotica]] (1), [[Novi Sad]] (1), [[Zrenjanin]] (1), [[Pancevo]] (2), [[Kruševac]] (1), [[Kragujevac]] (1), [[Cacak]] (2), and so on. Detailed list is currently available on CNGEurope Web site. {{Citation needed|date=February 2013}}

In [[Slovenia]], there are four public CNG refuelling stations as of December 2018. Two in the capital [[Ljubljana]], and one each in [[Maribor]] and [[Jesenice]]. Additionally, at least 14 new refuelling stations are planned in all city municipalities by the end of 2020.<ref>{{Cite web |title=Polnilne postaje |url=https://www.zemeljski-plin.si/promet/polnilne-postaje/ |website=zemeljski-plin.si |access-date=30 December 2018 |language=sl |archive-date=31 December 2018 |archive-url=https://web.archive.org/web/20181231092320/https://www.zemeljski-plin.si/promet/polnilne-postaje/ |url-status=live }}</ref> [[Ljubljana Passenger Transport]] operates 66 CNG fuelled city buses, as of May 2016.<ref>{{Cite web |title=Vozni park in statisticni podatki |url=http://www.lpp.si/ljubljanski-potniski-promet/o-druzbi/vozni-park-statisticni-podatki |website=lpp.si |date=30 October 2017 |access-date=30 December 2018 |language=sl |archive-date=13 November 2018 |archive-url=https://web.archive.org/web/20181113105420/http://www.lpp.si/ljubljanski-potniski-promet/o-druzbi/vozni-park-statisticni-podatki |url-status=live }}</ref><ref>{{Cite web |title=Novi okolju prijazni zgibni avtobusi na metan |url=http://www.lpp.si/aktualno/novi-okolju-prijazni-zgibni-avtobusi-na-metan |website=lpp.si |access-date=30 December 2018 |language=sl |archive-date=30 December 2018 |archive-url=https://web.archive.org/web/20181230233713/http://www.lpp.si/aktualno/novi-okolju-prijazni-zgibni-avtobusi-na-metan |url-status=live }}</ref> Its Maribor counterpart, [http://www.marprom.si/ Marprom] has 19 CNG city buses in their fleet, as of October 2018.<ref>{{Cite web |title=Šest novih plinskih avtobusov |url=http://www.marprom.si/aktualno/obvestilo/n/sest-novih-plinskih-avtobusov-457/ |website=marprom.si |access-date=30 December 2018 |language=sl |archive-url=https://web.archive.org/web/20181230233534/http://www.marprom.si/aktualno/obvestilo/n/sest-novih-plinskih-avtobusov-457/ |archive-date=30 December 2018 |url-status=dead }}</ref><ref>{{Cite web |title=Letno porocilo 2016 |url=http://www.marprom.si/fileadmin/dokumenti/Objave/Letno%20porocilo_2016.pdf |website=marprom.si |access-date=30 December 2018 |language=sl |archive-url=https://web.archive.org/web/20171031124523/http://www.marprom.si/fileadmin/dokumenti/Objave/Letno%20porocilo_2016.pdf |archive-date=31 October 2017 |url-status=dead }}</ref>

In [[Croatia]], there are two public CNG refuelling stations situated close to the center of [[Zagreb]] and in [[Rijeka]].<ref>{{Cite web|url=http://www.cngprices.com/|title=CNGPrices.com – Home|author=CNGPrices|website=Cngprices.com|access-date=15 May 2015|archive-date=18 May 2015|archive-url=https://web.archive.org/web/20150518084441/http://www.cngprices.com/|url-status=live}}</ref> At least 60 CNG buses are in use as a form of a public transport ([[ZET|Zagreb public transport services]]).

In [[Estonia]], there are 11 public CNG refuelling stations – four in the country's capital [[Tallinn]], and one each in [[Tartu]], [[Pärnu]], [[Viljandi]], [[Rakvere]], [[Jõhvi]], and [[Narva]].<ref>{{Cite web |url= https://www.gaas.ee/en/for-business/compressed-natural-gas/tanklad |title= Filling stations in Estonia |access-date= 2020-08-14 |archive-date= 2020-10-25 |archive-url= https://web.archive.org/web/20201025052517/https://www.gaas.ee/en/for-business/compressed-natural-gas/tanklad/ |url-status= live }}</ref> From 2011 on, Tartu has five Scania-manufactured CNG buses operating its inner-city routes.<ref>{{Cite web |url=http://www.ngvjournal.com/en/markets/item/4404-estonia-launches-cng-buses-in-major-city |title=Estonia launches CNG buses in major city |access-date=2012-12-27 |url-status=dead |archive-url=https://archive.today/20130129211928/http://www.ngvjournal.com/en/markets/item/4404-estonia-launches-cng-buses-in-major-city |archive-date=2013-01-29}}</ref>

[[File:SL7083.JPG|thumb|right|CNG powered bus in Sweden]]
In [[Sweden]], there are currently 90 CNG filling stations available to the public (as compared to about 10 LPG filling stations), primarily located in the southern and western parts of the country as well the Mälardalen region<ref>{{Cite web |author=Gasföreningen |url=http://www.gasforeningen.se/FaktaOmGas/tankstallen.aspx |title=Gasol och säkerhet, del 2 &#124; Gasföreningen |website=Gasforeningen.se |access-date=2016-07-17 |archive-date=2010-08-11 |archive-url=https://web.archive.org/web/20100811114420/http://www.gasforeningen.se/FaktaOmGas/tankstallen.aspx |url-status=live }}</ref> Another 70–80 CNG filling stations are under construction or in a late stage of planning (completions 2009–2010). Several of the planned filling stations are located in the northern parts of the country, which will greatly improve the infrastructure for CNG car users.<ref>{{Cite web|url=http://www.gasforeningen.se/upload/files/faktaomgas/fordonsgas/gastankkarta%20master%2015%20augusti%2008.pdf |title=Archived copy |access-date=2008-12-07 |url-status=dead |archive-url=https://web.archive.org/web/20090207073359/http://www.gasforeningen.se/upload/files/faktaomgas/fordonsgas/gastankkarta%20master%2015%20augusti%2008.pdf |archive-date=2009-02-07}}</ref> There are approx. 14,500 CNG vehicles in Sweden (2007), of which approx. 13,500 are passenger cars and the remainder includes buses and trucks.<ref>{{Cite web|url=http://www.gasforeningen.se/upload/files/faktaomgas/fordonsgas/statistik%20gasfordon%202007.jpg |format=JPG |title=Svenska Gasföreningen är en branschorganisation för energigaser |language=sv |website=Gasforeningen.se |access-date=2016-07-17 |url-status=dead |archive-url=https://web.archive.org/web/20100603143157/http://www.gasforeningen.se/upload/files/faktaomgas/fordonsgas/statistik%20gasfordon%202007.jpg |archive-date=2010-06-03}}</ref> In Stockholm, the public transportation company SL currently operates 50 CNG buses but have a capacity to operate 500.<ref>{{Cite web|url=http://miljoaktuellt.idg.se/2.1845/1.190405/sl-okar-till-500-biogasbussar |title=SL ökar till 500 biogasbussar - Miljöaktuellt |access-date=2008-12-07 |url-status=dead |archive-url=https://web.archive.org/web/20110725160930/http://miljoaktuellt.idg.se/2.1845/1.190405/sl-okar-till-500-biogasbussar |archive-date=2011-07-25}}</ref> The Swedish government recently prolonged its subsidies for the development of CNG filling stations, from 2009 to 2012–31 to 2010-12-31.<ref>{{Cite web |url=http://www.branschnyheter.se/article43197.php |title=Stödet till etablerandet av biogasmackar förlängs &#124; Industrinyheter.se |website=Branschnyheter.se |date=2008-11-28 |access-date=2016-07-17 |archive-url=https://web.archive.org/web/20090825193856/http://www.branschnyheter.se/article43197.php |archive-date=2009-08-25 |url-status=dead }}</ref>

In [[Spain]], CNG is a very new fuel and the refueling network is being developed. In Madrid, the [[Empresa Municipal de Transportes de Madrid|EMT]], uses 1915 buses running with CNG.<ref>{{cite web |title=Madrid se convierte en la primera gran ciudad europea con una flota de autobuses 100 % limpia |url=https://www.madrid.es/portales/munimadrid/es/Inicio/Movilidad-y-transportes/Madrid-se-convierte-en-la-primera-gran-ciudad-europea-con-una-flota-de-autobuses-100-limpia/?vgnextfmt=default&vgnextoid=fdfd2988fd165810VgnVCM2000001f4a900aRCRD&vgnextchannel=220e31d3b28fe410VgnVCM1000000b205a0aRCRD |website=[[Empresa Municipal de Transportes de Madrid|EMT]] |access-date=31 January 2023 |archive-date=31 January 2023 |archive-url=https://web.archive.org/web/20230131130812/https://www.madrid.es/portales/munimadrid/es/Inicio/Movilidad-y-transportes/Madrid-se-convierte-en-la-primera-gran-ciudad-europea-con-una-flota-de-autobuses-100-limpia/?vgnextfmt=default&vgnextoid=fdfd2988fd165810VgnVCM2000001f4a900aRCRD&vgnextchannel=220e31d3b28fe410VgnVCM1000000b205a0aRCRD |url-status=live }}</ref> At the beginning of 2015 there were 35 CNG refueling stations in Spain. Several car brands sell brand-new cars running with CNG, including Fiat, Volkswagen, Seat and Skoda among others.{{Citation needed|date=February 2013}}

As of 2013, there are 47 public CNG filling stations in the [[Czech Republic]], mainly in the big cities.<ref>{{Cite web|url=http://www.ngvaeurope.eu/european-ngv-statistics|title=European NGV Statistics|website=Ngvaeurope.eu|access-date=15 May 2015|archive-url=https://web.archive.org/web/20150511062535/http://www.ngvaeurope.eu/european-ngv-statistics|archive-date=11 May 2015|url-status=dead}}</ref> Local bus manufacturers SOR Libchavy and Tedom produce CNG versions of their vehicles, with roof-mounted cylinders.

===Middle East===
====Iran====
[[Iran]] has one of the largest fleets of CNG vehicles and CNG distribution networks in the world. There are 2335 CNG fueling stations, with a total of 13,534 CNG nozzles.<ref>{{Cite web|url=http://financialtribune.com/articles/energy/44382/cng-stations-top-2380-march|title=CNG Stations to Top 2,380 by March|date=25 June 2016|access-date=2 December 2016|archive-date=13 September 2016|archive-url=https://web.archive.org/web/20160913164410/http://financialtribune.com/articles/energy/44382/cng-stations-top-2380-march|url-status=live}}</ref> The number of CNG burning vehicles in Iran exceeds 3.5 million. CNG consumption by Iran's transportation sector is around 20 million cubic meters per day.<ref>{{Cite web|url=http://financialtribune.com/articles/economy-auto/32408/iran-gas-vehicle-market-projections|title=Iran Gas Vehicle Market Projections|date=19 December 2015|access-date=2 December 2016|archive-date=13 September 2016|archive-url=https://web.archive.org/web/20160913173014/http://financialtribune.com/articles/economy-auto/32408/iran-gas-vehicle-market-projections|url-status=live}}</ref>

=== North America ===
[[File:2009 Honda Civic NGV--DC.jpg|thumb|right|The [[Honda Civic GX]] is factory-built to run on CNG and it is available in several U.S. regional markets.]]
[[File:Metrobus powered with CNG 5198 DCA 03 2009.jpg|thumb|right|[[Bus]]es powered with CNG are common in the [[United States]] such as the [[New Flyer Industries]] C40LF bus in [[Washington, D.C.]] shown here.]]

==== Canada ====
Natural gas has been used as a motor fuel in Canada for over 20 years.<ref>{{Cite web |url=http://www.transportation.alberta.ca/Content/docType57/Production/NGVBrief.pdf |title=NATURAL GAS VEHICLES IN ALBERTA |website=Transportation.alberta.ca |access-date=2016-07-17 |archive-date=2016-04-15 |archive-url=https://web.archive.org/web/20160415002257/http://www.transportation.alberta.ca/Content/docType57/Production/NGVBrief.pdf |url-status=live }}</ref> With assistance from federal and provincial research programs, demonstration projects and NGV market deployment programs during the 1980s and 1990s, the population of light-duty NGVs grew to over 35,000 by the early 1990s. This assistance resulted in a significant adoption of natural gas transit buses as well.<ref name="iangv.org">{{Cite web|url=http://www.iangv.org/tools-resources/statistics.html |title=Natural Gas Vehicle Statistics |access-date=2010-04-27 |url-status=usurped |archive-url=https://web.archive.org/web/20100110101111/http://www.iangv.org/tools-resources/statistics.html |archive-date=2010-01-10}}</ref>

The NGV market started to decline after 1995, eventually reaching today's vehicle population of about 12,000.<ref name="iangv.org" />

This figure includes 150 urban transit buses, 45 school buses, 9,450 light-duty cars and trucks, and 2,400 forklifts and ice-resurfacers. The total fuel use in all NGV markets in Canada was 1.9 PJs (petajoules) in 2007 (or 54.6 million liters of petrol liters equivalent), down from 2.6 PJs in 1997. Public CNG refueling stations have declined in quantity from
134 in 1997 to 72 today. There are 22 in British Columbia, 12 in Alberta, 10 in Saskatchewan, 27 in
Ontario and two in Québec. There are only 12 private fleet stations.<ref name="oee.nrcan.gc.ca" />

Canadian industry has developed CNG-fueled truck and bus engines, CNG-fueled transit buses, and light trucks and taxis.

Fuelmaker Corporation of Toronto, the Honda-owned manufacturer of CNG auto refueling units, was forced into bankruptcy by parent Honda USA for an unspecified reason in 2009.<ref>{{Cite web|url=http://www.theautochannel.com/news/2009/04/06/455943.html|title=BREAKING STORY: Honda Suddenly Kills Fuelmaker In Stunning Move That Outrages CNG Movement|website=Theautochannel.com|access-date=15 May 2015|archive-date=18 May 2015|archive-url=https://web.archive.org/web/20150518084316/http://www.theautochannel.com/news/2009/04/06/455943.html|url-status=live}}</ref> The various assets of Fuelmaker were subsequently acquired by Fuel Systems Corporation of Santa Ana, California.

==== United States ====
[[File:MARTA 2013 Xcelsior (XN40) 1410 on the 132 Bus .jpg|thumb|This [[Metropolitan Atlanta Rapid Transit Authority|MARTA]] bus is a New Flyer XN40 which runs on CNG. 70% of MARTA's bus fleet is CNG.]]
[[File:CNG Trans Filling Station 1.jpg|thumb|CNG Fueling Station in Columbus, Ohio]]
Similar to Canada, the United States has implemented various NGV initiatives and programs since 1980, but has had limited success in sustaining the market. There were 105,000 NGVs in operation in 2000; this figure peaked at 121,000 in 2004, and decreased to 110,000 in 2009.<ref name="iangv.org" />

In the United States, federal [[Tax credit|tax credits]] are available for buying a new CNG vehicle. Use of CNG varies from state to state; only 34 states have at least one CNG fueling site.<ref>{{Cite web|url=http://www.cnglocator.net/CNGlocations.html|title=CNG Fueling Sites – Compressed Natural Gas Fueling Locations|website=Cnglocator.net|access-date=15 May 2015|archive-date=25 April 2015|archive-url=https://web.archive.org/web/20150425195300/http://www.cnglocator.net/CNGlocations.html|url-status=live}}</ref>

In Texas, Railroad Commissioner David Porter launched his Texas Natural Gas Initiative in October 2013 to encourage the adoption of natural gas fuel in the transportation and exploration and production sectors.<ref>{{Cite web |url=http://www.rrc.state.tx.us/about-us/commissioners/porter/news/090814b/ |title=Texas RRC – RRC Commissioner Porter: Natural Gas Fueling Stations Up 50 Percent Additional Fueling Stations Creating Corridor for Alternate Transportation Fuel |website=Rrc.state.tx.us |access-date=2016-07-17 |archive-url=https://web.archive.org/web/20160904074215/http://www.rrc.state.tx.us/about-us/commissioners/porter/news/090814b/ |archive-date=2016-09-04 |url-status=dead}}</ref> As of 2015 Texas is rapidly becoming a leader in natural gas infrastructure in the US with 137 natural gas fueling stations (private and public).<ref>{{Cite web |url=http://www.rrc.texas.gov/media/28861/6-4-2015porter2.png |title=Natural Gas Refueling in Texas : Map |website=Rrc.texas.gov |access-date=2016-07-17 |archive-date=2016-03-04 |archive-url=https://web.archive.org/web/20160304035142/http://www.rrc.texas.gov/media/28861/6-4-2015porter2.png |url-status=live }}</ref> Nine months into FY2015 Commissioner Porter reports Texas CNG, LNG Sales Show 78 Percent Increase Over FY 2014 year to date.<ref name="rrc.texas.gov">{{Cite web |url=http://www.rrc.texas.gov/about-us/commissioners/porter/news/060415/ |title=Texas RRC – RRC Commissioner Porter: Texas CNG, LNG Sales Show 78 Percent Increase Over FY 2014 |website=Rrc.texas.gov |date=2010-11-02 |access-date=2016-07-17 |archive-url=https://web.archive.org/web/20151004024318/http://www.rrc.texas.gov/about-us/commissioners/porter/news/060415/ |archive-date=2015-10-04 |url-status=dead}}</ref> Per Commissioner Porter<ref name="rrc.texas.gov" /> in June 2015: "Natural gas vehicles are becoming mainstream faster than expected. These collections are nearly double the amount collected last year at this time. At 15 cents per gallon equivalent, $3,033,600 of motor fuel tax equates to the sale of 20,224,000 gallon equivalents of natural gas." The $3 million in Texas natural gas tax receipts is for both CNG and LNG for FY2015 through the May 2015. The Texas fiscal year starts Sept 1 so 9 months tax collections are represented.

In Athens, Ala., the city and its Gas Department installed a public CNG station on the Interstate 65 Corridor, making it the only public CNG station between Birmingham and Nashville as of February 2014. The city's larger fleet vehicles such as garbage trucks also use this public station for fueling. The city also has two slow-fill non-public CNG stations for its fleet. Athens has added CNG/petrol Tahoes for police and fire, a CNG Honda Civic, CNG Heil garbage trucks, and CNG/petrol Dodge pickup trucks to its fleet.

In California, CNG is used extensively in local city and county fleets, as well as public transportation (city/school buses). There are 90 public fueling stations in southern California alone, and travel from San Diego so the Bay Area to Las Vegas and Utah is routine with the advent of online station maps such as www.cngprices.com. Compressed natural gas is typically available for 30-60 percent less than the cost of petrol in much of California.
[[File:GCT Orion 7.01 029 on the 35 bus on P'tree Corners.jpg|thumb|[[Ride Gwinnett|Gwinnett County Transit]] Orion VII CNG 029 on the 35 Bus on Peachtree Corners.]]
The 28 buses running the [[Gwinnett County Transit]] local routes run on 100 percent CNG. Additionally, about half of the [[Georgia Regional Transportation Authority]] express fleet, which runs and refuels out of the Gwinnett County Transit facility, uses CNG.<ref>{{Cite web|url=http://www.gwinnettcounty.com/portal/gwinnett/Departments/Transportation/GwinnettCountyTransit|title=Gwinnett County Transit|website=Gwinnettcounty.com|access-date=15 May 2015|archive-date=28 March 2015|archive-url=https://web.archive.org/web/20150328124559/https://www.gwinnettcounty.com/portal/gwinnett/Departments/Transportation/GwinnettCountyTransit|url-status=live}}</ref>

The [[Massachusetts Bay Transportation Authority]] was running 360 CNG buses as early as in 2007, and is the largest user in the state.<ref>{{Cite web |title=About the MBTA > News & Events |author=RDVO, Inc. |publisher=MBTA |url=http://www.mbta.com/about_the_mbta/news_events/?id=14023&month=&year= |access-date=15 May 2015 |archive-date=8 January 2016 |archive-url=https://web.archive.org/web/20160108100800/http://www.mbta.com/about_the_mbta/news_events/?id=14023&month=&year= |url-status=live }}</ref>

The [[Metropolitan Transportation Authority]] (MTA) of New York City currently has over 900 buses powered by compressed natural gas, with CNG bus depots located in [[Brooklyn]], [[The Bronx]], and [[Queens]].

The [[Nassau Inter-County Express]] (or NICE Bus, formerly New York MTA Long Island Bus) runs a 100% Orion CNG-fueled bus fleet for fixed-route service, consisting of 360 buses for service in Nassau County, parts of Queens, New York, and the western sections of Suffolk County.

The City of Harrisburg, Arkansas has switched some of the city's vehicles to compressed natural gas in an effort to save money on fuel costs. Trucks used by the city's street and water, sewer, and gas departments have been converted from petrol to CNG.<ref>{{Cite web |url=http://www.cngnow.com/news/Post.aspx?ID=672 |title=City of Harrisburg switches city trucks, police car, to compressed natural gas |work=CNGnow.com |access-date=15 May 2015 |archive-date=18 May 2015 |archive-url=https://web.archive.org/web/20150518072159/http://www.cngnow.com/news/Post.aspx?ID=672 |url-status=live }}</ref>

Personal use of CNG is currently a small niche market, though with current tax incentives and a growing number of public fueling stations available, it is experiencing unprecedented growth. The state of Utah offers a subsidised statewide network of CNG filling stations at a rate of $1.57/[[Gasoline gallon equivalent|gge]],<ref>{{Cite web |url=http://cngprices.com/ |title=Natural Gas Prices in the US |access-date=2013-10-23 |archive-date=2011-02-08 |archive-url=https://web.archive.org/web/20110208143635/http://www.cngprices.com/ |url-status=live }}</ref> while petrol is above $4.00/[[gallon|gal]].

Elsewhere in the nation, retail prices average around $2.50/gge, with home refueling units compressing gas from residential gas lines for under $1/gge. Other than aftermarket conversions, and government used vehicle auctions, the only currently{{When|date=October 2012}} produced CNG vehicle in the United States is the [[Honda Civic GX]] sedan, which is made in limited numbers and available only in states with retail fueling outlets.

An initiative, known as [[Pickens Plan]], calls for the expansion of the use of CNG as a standard fuel for heavy vehicles has been recently started by oilman and entrepreneur [[T. Boone Pickens]]. California voters defeated [[California Proposition 10 (2008)|Proposition 10]] in the 2008 General Election by a significant (59.8 percent to 40.2 percent) margin. Proposition 10 was a $5 billion bond measure that, among other things, would have given rebates to state residents that purchase CNG vehicles.

On February 21, 2013, [[T. Boone Pickens]] and New York Mayor, [[Michael Bloomberg]] unveiled a CNG powered mobile pizzeria. The company, [[Neapolitan Express]] uses alternative energy to run the truck as well as 100 percent recycled and compostable materials for their carryout boxes.<ref>{{Cite web|url=http://www.nydailynews.com/new-york/city-neapolitan-express-unveil-eco-friendly-food-truck-article-1.1270160|title=City, Neapolitan Express unveil city's first eco-friendly food truck|website=[[New York Daily News]]|date=21 February 2013 |access-date=2 December 2016|archive-date=11 July 2017|archive-url=https://web.archive.org/web/20170711092944/http://www.nydailynews.com/new-york/city-neapolitan-express-unveil-eco-friendly-food-truck-article-1.1270160|url-status=live}}</ref>

Congress has encouraged conversion of cars to CNG with a tax credits of up to 50 percent of the auto conversion cost and the CNG home filling station cost. However, while CNG is much cleaner fuel, the conversion requires a type certificate from the EPA. Meeting the requirements of a type certificate can cost up to $50,000. Other non-EPA approved kits are available. A complete and safe aftermarket conversion using a non-EPA approved kit can be achieved for as little as $400 without the cylinder.<ref>{{Cite web |url=http://www.younkincng.com/ |title=YounkinCNG.com |website=Younkincng.com |access-date=2016-07-17 |archive-date=2016-04-15 |archive-url=https://web.archive.org/web/20160415002636/http://www.younkincng.com/ |url-status=live }}</ref>

===== Deployments =====
[[AT&T]] ordered 1,200 CNG-powered cargo vans from [[General Motors]] in 2012. It is the largest-ever order of CNG vehicles from [[General Motors]] to date.<ref>{{Cite web|url=http://media.gm.com/media/us/en/gm/news.detail.html/content/Pages/news/us/en/2012/Jan/0130_cng.html|title=AT&T Orders 1,200 CNG-powered Chevrolet Express Vans|work=media.gm.com|date=30 January 2012|access-date=15 May 2015|archive-date=18 May 2015|archive-url=https://web.archive.org/web/20150518093210/http://media.gm.com/media/us/en/gm/news.detail.html/content/Pages/news/us/en/2012/Jan/0130_cng.html|url-status=live}}</ref> AT&T has announced its intention to invest up to $565 million to deploy approximately 15,000 alternative fuel vehicles over a 10-year period through 2018, will use the vans to provide and maintain communications, high-speed Internet and television services for AT&T customers.<ref>{{Cite web|url=http://www.att.com/gen/press-room?pid=4800&cdvn=news&newsarticleid=26598&mapcode=corporate%7cmk-att-sustainability|title=AT&T Press Release Headlines & News from AT&T|website=Att.com|access-date=15 May 2015|archive-date=19 May 2015|archive-url=https://web.archive.org/web/20150519032529/http://www.att.com/gen/press-room?pid=4800&cdvn=news&newsarticleid=26598&mapcode=corporate%7Cmk-att-sustainability|url-status=live}}</ref>

=== South America ===
[[File:Shell station in Rosario.jpg|thumb|right|CNG station in [[Rosario]], Argentina.]]
CNG vehicles are commonly used in [[South America]], where these vehicles are mainly used as taxicabs in main cities of Argentina and Brazil.<ref name="LatinGNV">{{Cite web|url=http://www.ngvglobal.com/en/country-reports/latin-america-ngvs-an-update-report-02074.html |archive-url=https://archive.today/20081120221031/http://www.ngvglobal.com/en/country-reports/latin-america-ngvs-an-update-report-02074.html |url-status=usurped |archive-date=2008-11-20 |title=Latin America NGVs: An Update Report |author=R. Fernandes |publisher=International Association of Natural Gas Vehicles |date=2008-08-20 |access-date=2008-10-11}}</ref> Normally, standard petrol vehicles are retrofitted in specialized shops, which involve installing the gas cylinder in the trunk and the CNG injection system and electronics. Argentina and Brazil are the two countries with the largest fleets of CNG vehicles,<ref name="LatinGNV" /> with a combined total fleet of more than 3.4 million vehicles by 2009.<ref name=IANGV /> Conversion has been facilitated by a substantial price differential with liquid fuels, locally produced conversion equipment and a growing CNG-delivery infrastructure.

As of 2009 Argentina had 1,807,186 NGV's with 1,851 refueling stations across the nation,<ref name=IANGV /> or 15 percent of all vehicles;<ref name="LatinGNV" /> and Brazil had 1,632,101 vehicles and 1,704 refueling stations,<ref name=IANGV /> with a higher concentration in the cities of [[Rio de Janeiro]] and [[São Paulo]].<ref name="LatinGNV" /><ref name="GNVNews">{{Cite web|url=http://www.bigas.com.br/sistema/?modulo=gnvnews&acao=abrir&id=22 |title=Montadores Investem nos Carros á GNV|author=GNVNews|publisher=Institutio Brasileiro de Petroleo e Gas|date=November 2006|access-date=2008-09-20|language=pt|url-status=dead|archive-url=https://web.archive.org/web/20081211175309/http://www.bigas.com.br/sistema/?modulo=gnvnews&acao=abrir&id=22|archive-date=2008-12-11}}</ref>

[[Colombia]] had an NGV fleet of 300,000 vehicles, and 460 refueling stations, as of 2009.<ref name=IANGV /> [[Bolivia]] has increased its fleet from 10,000 in 2003 to 121,908 units in 2009, with 128 refueling stations.<ref name=IANGV /> [[Peru]] had 81,024 NGVs and 94 fueling stations as 2009,<ref name=IANGV /> but that number is expected to skyrocket as Peru sits on South America's largest gas reserves.<ref name="LatinGNV" /> In Peru several factory-built NGVs have the cylinders installed under the body of the vehicle, leaving the trunk free. Among the models built with this feature are the Fiat Multipla, the new Fiat Panda, the Volkswagen Touran Ecofuel, the Volkswagen Caddy Ecofuel and the Chevy Taxi. Other countries with significant NGV fleets are [[Venezuela]] (15,000) and [[Chile]] (8,064) as of 2009.<ref name="IANGV" />

=== Oceania ===
During the 1970s and 1980s, CNG was commonly used in [[New Zealand]] in the wake of the oil crises, but fell into decline after petrol prices receded. At the peak of natural gas use, 10 percent of New Zealand's cars were converted, around 110,000 vehicles.<ref name="TwoBillion">{{Cite book | last = Sperling, Daniel and Deborah Gordon | title = Two billion cars: driving toward sustainability | year = 2009 | pages = [https://archive.org/details/twobillioncarsdr00sper_0/page/42 42–43] | publisher = [[Oxford University Press]], New York | isbn = 978-0-19-537664-7 | url-access = registration | url = https://archive.org/details/twobillioncarsdr00sper_0/page/42 }}</ref>

[[File:Sydney Buses (mo 1298) Custom Coaches 'Citaro' bodied Mercedes-Benz O405NH CNG on Loftus Street in Circular Quay (cropped).jpg|thumb|left|A [[Custom Coaches]] bodied [[Mercedes-Benz O405NH]] running on CNG, operated by [[State Transit Authority|Sydney Buses]] in Australia]]
[[File:Transperth 2005 Volgren CR228L bodied Mercedes-Benz OC 500 LE CNG 1912.jpg|thumb|right|[[Transperth]] [[Mercedes-Benz OC500LE]] running on CNG]]
For a period of time, [[Brisbane Transport]] in [[Queensland]], Australia adopted a policy of purchasing only CNG buses. Brisbane Transport has [https://web.archive.org/web/20131029190936/http://www.btbuses.info/?GoTo=fleetspecs&find=Scania%20L94UB%20%5BVolgren%5D&searching=yes 215] [[Scania L94UB]] and [https://web.archive.org/web/20131029195407/http://www.btbuses.info/?GoTo=fleetspecs&find=MAN%2018.310%20(CNG)%20%5BVolgren%5D&searching=yes 324] MAN 18.310 models as well as [https://web.archive.org/web/20131029201342/http://www.btbuses.info/?GoTo=fleetspecs&find=MAN%20NG313%20artic%20%5BCustom%20Coaches%5D&searching=yes 30] MAN NG 313 articulated CNG buses. The [[State Transit Authority]] purchased 100 [[Scania L113]]CRB, 283 [[Mercedes-Benz O405]]NH and 254 [[Euro 5]]-compliant [[Mercedes-Benz OC500LE]] buses.<ref>{{Cite web|title=Mercedes-Benz OC500LE&nbsp;– CNG |url=http://www.sydneybuses.info/corporate/bus-fleet/mercedes-benz-oc500le.htm |work=Sydney Buses |publisher=New South Wales Government |access-date=28 August 2010 |url-status=dead |archive-url=https://web.archive.org/web/20081202061022/http://www.sydneybuses.info/corporate/bus-fleet/mercedes-benz-oc500le.htm |archive-date=December 2, 2008}}</ref>

In the 1990s, [[CDC Geelong|Benders Busways]] of [[Geelong]], [[Victoria, Australia|Victoria]] trialled CNG buses for the Energy Research and Development Corporation.<ref>{{Cite web|url=http://www.eidn.com.au/PDF/ERDC204.pdf|title=NGV Bus Demonstration&nbsp;– H Bender&nbsp;– December 1993|access-date=2007-07-26|url-status=dead|archive-url=https://web.archive.org/web/20160108100800/http://www.eidn.com.au/PDF/ERDC204.pdf|archive-date=2016-01-08}}</ref>

{{Commons category|Compressed natural gas}}
Martin Ferguson, Ollie Clark and Noel Childs featured on ''[[The 7:30 Report]]'' raised the issue of CNG as an overlooked transport fuel option in Australia, highlighting the large volumes of LNG currently being exported from the North West Shelf in light of the cost of importing crude oil to Australia.<ref>{{Cite web|title=Natural gas: the future of fuel?|url=http://www.abc.net.au/7.30/content/2007/s2230825.htm|work=The 7.30 Report|publisher=Australian Broadcasting Corporation|access-date=28 August 2010|date=29 April 2008|archive-date=4 December 2010|archive-url=https://web.archive.org/web/20101204105144/http://www.abc.net.au/7.30/content/2007/s2230825.htm|url-status=live}}</ref>
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== References ==
{{Reflist|30em}}
{{Fuel gas}}
{{Motor fuel}}
{{Alternative propulsion}}

{{DEFAULTSORT:Compressed Natural Gas}}
[[Category:Fuel gas]]
[[Category:Natural gas]]