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geothermal energy, a natural resource of heat energy from within Earth that can be captured and harnessed for cooking, bathing, space heating, electrical power generation, and other uses.
Some applications of geothermal energy use the earth's temperatures near the surface and others require drilling miles into the earth. There are three main types of geothermal energy systems: Direct use and district heating systems. Geothermal power plants.
See how we can generate clean, renewable energy from hot water sources deep beneath the Earth's surface. The video highlights the basic principles at work in geothermal energy production and illustrates three different ways the earth's heat can be converted into electricity.
Geothermal energy is a renewable energy source because heat is continuously produced inside the earth. People use geothermal heat for bathing, for heating buildings, and for generating electricity. Source: Adapted from a National Energy Education Development Project graphic (public domain)
There are many advantages of geothermal energy. It can be extracted without burning a fossil fuel such as coal, gas, or oil.
Geothermal energy is thermal energy extracted from the Earth's crust. It combines energy from the formation of the planet and from radioactive decay. Geothermal energy has been exploited as a source of heat and/or electric power for millennia.
Geothermal energy is heat that is generated within Earth. (Geo means “earth,” and thermal means “heat” in Greek.) It is a renewable resource that can be harvested for human use. About 2,900 kilometers (1,800 miles) below Earth’s crust, or surface, is the hottest part of our planet: the core.
Get fast facts about geothermal energy, including a peek at its role in the natural world, home heating and cooling, and power production.
Geothermal energy—energy derived from the heat of the earth—can be harnessed both as a source of renewable electricity as well as directly for heating and cooling applications. The U.S. Department of Energy (DOE) funds geothermal research and development (R&D) to help stimulate the growth of the geothermal industry and encourage quick ...
Geothermal power is a form of energy conversion in which geothermal energy—namely, steam tapped from underground geothermal reservoirs and geysers—drives turbines to produce electricity. It is considered a form of renewable energy.