Geothermal Power Plants Face Rocky Starts

Vast reservoirs of heat are locked in the earth's interior, untapped. The ground underneath our feet holds so much heat that tapping only 2 percent of it could satisfy current annual U.S. energy... -- Read more on ScientificAmerican.com

Source: http://www.scientificamerican.com/article.cfm?id=geothermal-power-plants-face-rocky-starts

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