Learn more: Geothermal energy is heat energy from the earth—Geo (earth) + thermal (heat). Geothermal resources are reservoirs of hot water that exist or are human made at varying temperatures and depths below the Earth's surface.

The Geothermal Energy Association estimates that 125 projects now under development around the country could provide up to 2,500 megawatts of new capacity [ 3 ]. As EGS technologies improve and become competitive, even more of the largely untapped geothermal resource could be developed.

Geothermal energy is the thermal energy in the Earth's crust which originates from the formation of the planet and from radioactive decay of materials. The high temperature and pressure in Earth's interior cause some rock to melt and solid mantle to behave plastically.

Complete step by step answer: The geothermal energy is defined as the heat within the Earth. The word geothermal is a combination of two Greek words, geo meaning earth and thermal meaning heat. The source of the Earth’s interior heat is the thermal energy generated from radioactive decay and the continuous loss of heat from the Earth’s interior.