Answer:
Geothermal energy is harnessed from steam from hot springs and hot aquifers. The steam rotates a turbine that activates a generator, which produces electricity. Many power plants still use fossil fuels to boil water for steam. Geothermal power plants, however, use steam produced from reservoirs of hot water found a couple of miles or more below the earth's surface. The steam is piped directly from underground wells to the power plant, where it is piped directly from underground wells to the power plant, where it is directed into a turbine/generator unit. Only a few countries use it because it is limited to volcanic prone areas only.
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