17 Jun '11, 7pm

Geothermal Power is Heating up Worldwide

Geothermal Power is Heating up Worldwide

The energy source for geothermal electricity generation is the tremendous heat flowing from the Earth's core and mantle and from radioactive isotopes decaying in the Earth's crust. Developers drill wells to reach porous and permeable rock containing reservoirs of hot water or steam that is then brought to the surface to drive a turbine and generate electricity. Historically, this required a water temperature of 150 degrees Celsius (302 degrees Fahrenheit) or more, which is found in abundance in countries along the Pacific Ring of Fire—including Chile, Indonesia, Japan, and the United States—as well as in Africa's Great Rift Valley region. Recent technology improvements , however, have made power generation using lower-temperature resources possible, enabling Germany, Hungary, and others to begin harnessing their geothermal power potential. SLIDESHOW: Geysers Explode With E...

Full article: http://www.treehugger.com/files/2011/06/geothermal-power-...

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