Geothermal energy can be developed in many more ways than producing electricity. For example, it's hard to drill a well in volcano-rich Iceland and not encounter warm water. Virtually every building in that country is heated by routing such water through radiators. Geothermal heat is also being increasingly developed to both heat and cool buildings by installing ground-source (also called geothermal) heat pumps. If using geothermal heat to cool a building sounds magical, you may want to read about this process and many other characteristics of geothermal resources in USGS Circular 1249, Geothermal Energy - Clean Power From the Earth's Heat. Search this title at Google, and you can download your own copy.
Wendell A. Duffield
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