Geothermal is related to energy and may refer to: Earth's internal heat budget, accounting of the flows of energy at and below the surface of the planet's crust The geothermal gradient, which directs the flows of heat within the Earth Geothermal energy, useful energy generated and stored in the Earth. The energy can be used for: district heating within buildings and industry geothermal power plants to generate electricity Geothermal exploration, the search for commercially usable geothermal energy Renewable technology Earth sheltering, constructing a building into a hill side or Earth berm to reduce heating and cooling requirements Earth cooling tubes, using ambient Earth temperature to cool and dehumidify air Geothermal desalination, the production of fresh water using heat energy extracted from underground rocks Geothermal heating, methods of heating and cooling a building using underground heat Geothermal electricity, electricity generated from naturally occurring geological heat sources Geothermal heat pump (GHP), a device used for heating and cooling using the earth as a heat reservoir Direct exchange geothermal heat pump, a method of heating and cooling with the energy of the earth using direct exchange of heat Hot dry rock geothermal energy, heating water in hot deep rock