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Geothermal Energy

Wells can be drilled into underground reservoirs for the generation of electricity. Some geothermal power plants use the steam from a reservoir to power a turbine/generator, while others use the hot water to boil a working fluid that vaporizes and then turns a turbine.

Where they produce

Very few places around the globe provide the special conditions needed to generate geothermal energy for example: In the United States, most geothermal reservoirs of hot water are located in the western states, Alaska, and Hawaii and in the Philippines, Iceland, and El Salvador.

How much they produce

For example, more than 8,900 megawatts (MW) of large, utility-scale geothermal capacity in 24 countries now produce enough electricity to meet the annual needs of nearly 12 million typical U.S. households (GEA 2008a). Geothermal plants produce 25 % or more of electricity in the Philippines, Iceland, and El Salvador.

How it works

What is geothermal energy?

Geothermal energy is the heat from the Earth. It's clean and sustainable. Resources of geothermal energy range from the shallow ground to hot water and hot rock found a few miles beneath the Earth's surface.

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