Geothermal Power, also known as geothermal energy, refers to harnessing the internal heat energy of the Earth as a renewable source of electricity. The Earth's interior is extremely hot, with temperatures increasing with depth. Close to the Earth's surface, this heat can be used directly for heating and as a source of renewable power.
Geothermal energy utilizes reservoirs of water ... https://sanjanacmi.livepositively.com/geothermal-power-harnessing-the-heat-from-within-the-earth/new=1