Geothermal

Geothermal is related to energy and may refer to: * Geothermal energy, useful energy generated and stored in the Earth * Geothermal activity, the range of natural phenomena at or near the surface, associated with release of the Earth's internal heat. * Earth's internal heat budget, accounting of the flows of energy at and below the surface of the planet's crust * Geothermal gradient, down which heat flows within the Earth * Geothermal exploration, the search for commercially usable geothermal energy Provided by Wikipedia