Geothermal is related to energy and may refer to:
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Geothermal energy, useful energy generated and stored in the Earth
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Geothermal activity, the range of natural phenomena at or near the surface, associated with release of the Earth's internal heat.
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Earth's internal heat budget, accounting of the flows of energy at and below the surface of the planet's crust
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Geothermal gradient, down which heat flows within the Earth
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Geothermal exploration, the search for commercially usable geothermal energy
Uses of geothermal energy
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Earth sheltering, constructing a building into a hill side or Earth berm to reduce heating and cooling requirements
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Earth cooling tubes, using ambient Earth temperature to cool and dehumidify air
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Geothermal desalination, the production of fresh water using heat energy extracted from underground rocks
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Geothermal heating, methods of heating and cooling a building using underground heat
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Geothermal power, electricity generated from naturally occurring geological heat sources
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Ground source heat pump, a device used for heating and cooling using the earth as a heat reservoir
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Direct exchange geothermal heat pump, a method of heating and cooling with the energy of the earth using direct exchange of heat
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Hot dry rock geothermal energy, heating water in hot deep rock
