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The environmental effects of geothermal energy depend on how geothermal energy is used or how it is converted to useful energy. Direct-use applications and geothermal heat pumps have almost no negative effects on the environment. In fact, they can have a positive effect by reducing the use of energy sources that can have negative effects on the environment.
Geothermal power plants do not burn fuel to generate electricity, but they may release small amounts of sulfur dioxide and carbon dioxide. Geothermal power plants emit 97% less acid rain-causing sulfur compounds and about 99% less carbon dioxide than fossil fuel power plants of similar size. Geothermal power plants use scrubbers to remove the hydrogen sulfide naturally found in geothermal reservoirs. Most geothermal power plants inject the geothermal steam and water that they use back into the earth. This recycling helps to renew the geothermal resource and to reduce emissions from the geothermal power plants.
Geothermal features in national parks, such as geysers and fumaroles in Yellowstone National Park, are protected by law.
Grand Prismatic Spring, Yellowstone National Park, Wyoming
Source: Stock photography (copyrighted)
Last updated: December 27, 2022