Geothermal energy - simple english wikipedia, free, Geothermal energy (from the greek roots geo, meaning earth, and thermos, meaning heat) is energy made by heat inside the earth's crust. it's clean and sustainable.. Geothermal power - wikipedia, The largest group of geothermal power plants in the world is located at the geysers, a geothermal field in california, united states. as of 2004, five countries (el. Environmental impacts geothermal energy | union , The environmental impacts of geothermal energy vary depending on the technology used to generate electricity and the type of cooling system utilized..
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