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Agricaltural Managment.

 

Geothermal energy is not a strictly renewable energy source like wind or hydro, because the ground cools down slowly as energy is extracted from it. Nevertheless, it does slowly renew thanks to radioactive heating. It is thought that molten rock at temperatures between 1,200 and 2,200°F (650 to 1,200°C) can be found in pockets 50 to 60 miles (about 80 to 97 km) underneath the earth's surface, just beneath the tectonic plates. This would provide a prodigious source of geothermal energy, but the deepest hole mankind has drilled only extends about 8 miles (13 km) down. As we move towards independence from fossil fuels, geothermal will join solar and nuclear energy in providing clean power to the world's offices, industries, and homes.