Green Glossary
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Geothermal energy
Geothermal energy is the energy generated by harnessing the heat stored beneath the Earth's surface. It is generated in the Earth's core, about 4,000 miles below the surface. The steam and hot water produced inside the Earth are used to heat buildings or generate electricity. Geothermal energy is a renewable energy source because the water is replenished by rainfall and heat is continuously produced inside the Earth.
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