Geothermal power harnesses heat trapped in the earth's crust to produce electricity.  Initially, wells are drilled into reservoirs of geothermal fluid (hot water and steam) > 150°C generally residing within 2,500 meters of the surface. This retrieved fluid of hot water and steam is brought to the surface and used to drive a turbine generator. Once the steam has been used, it is condensed and re-injected back into the reservoir.

Many geothermal plants have been in operation for over 40 years, with certain parts of the world being geologically favourable to geothermal energy i.e. the Western U.S., the Philippines and Iceland. Alternatively, Geothermal energy provides clean, renewable power and unlike other renewables such as wind and solar, is available continuously, 24 hours a day. Geothermal plants generally have a smaller geographical footprint and less visual impact when compared with solar or wind farms.

Geothermal power plants have a higher capacity factor than nuclear or coal energy plants, are cheaper to build, cleaner to operate and do not require fuel.