Template:POTD/2007-11-25
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The Nesjavellir geothermal power plant, located near Þingvellir, Iceland is the largest of five such plants in the country. Because of the high concentration of volcanoes in Iceland, geothermal energy is so inexpensive that in the wintertime, some pavements in Reykjavík and Akureyri are heated.Photo credit: Gretar Ívarsson