Geothermal Energy

Geothermal Energy
  Energy produced by the internal heat of the earth; geothermal heat sources include: hydrothermal convective systems; pressurized water reservoirs; hot dry rocks; manual gradients; and magma. Geothermal energy can be used directly for heating or to produce electric power.
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  Hot water or steam extracted from geothermal reservoirs in the earth's crust. Water or steam extracted from geothermal reservoirs can be used for geothermal heat pumps, water heating, or electricity generation.
  U.S. Dept. of Energy, Energy Information Administration's Energy Glossary
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  Natural heat from within the earth, captured for production of electric power, space heating or industrial steam.
  California Energy Comission. Dictionary of Energy Terms

Energy terms . 2014.

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