Geothermal

Geothermal is related to energy and may refer to:

• The geothermal gradient and associated heat that flows from within the Earth
• Geothermal energy, the thermal energy generated and stored in the Earth. This heat energy can be used for heating in the form of district heating or to generate electricity through geothermal power plants
• 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