Geothermal energy has tremendous potential for producing electricity, by tapping into the "earth heat" that lies just beneath the surface of the earth.

About 8,000 megawatts (MW) of geothermal electricity are currently produced around the world, including about 2,800 MW of capacity in the United States. Today’s technology uses the steam from hydrothermal (hot water/steam) resources to turn turbines, which drive generators that generate electricity.

In the future, we may be able to produce electricity using the heat from the hot, dry rock formations of Earth’s crust, and possibly from the Earth’s magma, the molten rock deeper beneath the Earth’s surface.