subject: Characteristics Of New Energy [print this page] Earth's internal heat source may be different from the gravitational tidal friction, the chemical reaction and radioactive decay energy released so. The main heat source of radioactive heat the Earth. Rich in geothermal resources in China, widely distributed, has 5,500 to hot geothermal field 45, the total geothermal resources of about 3.2 million megawatts.
