Geothermal energy is derived from the heat naturally emitted from the Earth's interior. This form of energy may be harnessed from underground steam and water sources and heat from solid rock and magma. It is a renewable energy source that may be used in many applications instead of fossil fuels.
Generators utilize collected geothermal energy to power heating, factory and household appliances. Collecting geothermal energy typically produces less ecologically harmful waste than the burning of fossil fuels and is more reliable than other less ecologically harmful energy sources, such as wind power. It is also less costly than the utilization of fossil fuels, although geothermal energy sites may be depleted over time from extensive use.