Geothermal energy means heat that is extracted from the Earth's interior and converted into energy. "Geo" means earth and "thermal" means heat. (wikicommon)

What is Geothermal Energy and How Do We Use It?

Geothermal energy means heat that is extracted from the Earth’s interior and converted into energy. “Geo” means earth and “thermal” means heat. It is an emerging technology that harnesses the heat from miles below ...