geothermal energy definition
Geothermal energy is renewable, clean power derived from the thermal energy in subterranean earth. The earthâs thermal energy is created by the decay of radioactive elements in the earth along with the heat from the sun and that remaining from the earthâs creation.Unlike solar power or wind power, geothermal energy is not interrupted by lull times. The technology also has a small carbon footprint in development.eothermal energy can also be used to drive steam turbines. One example of this technology is Calpine Corporationâs geothermal plants in the Mayacamas Mountains in northwestern California. These 15 plants produce up to 725 megawatts daily, making them the largest geothermal energy source in America.