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