Geothermal energy has been used for a variety of applications throughout history. The Romans used geothermally heated water in their bathhouses for centuries. The Romans also used the water to treat illnesses and heat homes. In Iceland and New Zealand, many people cooked their food using geothermal heat and some North American native tribes used geothermal vents for heating as well as cooking. Through the use of modern technology we are able to harness a much greater amount of goethermal energy allow for extensive heating/cooling applications as well as the development of large scale power plants driven solely by Geothermal energy obtained from the earth.
Geothermal Power, A Quick Overview