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![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/9f/NesjavellirPowerPlant_edit2.jpg/640px-NesjavellirPowerPlant_edit2.jpg)
Photo credit: From an image by Grétar Ívarsson
Geothermal power, the harnessing of geothermal heat to generate electricity, is used in over 20 countries.
Photo credit: From an image by Grétar Ívarsson
Geothermal power, the harnessing of geothermal heat to generate electricity, is used in over 20 countries.