Energy at Work: Geothermal Power

Introduces the history, uses, production, advantages and disadvantages, and future of geothermal energy as a power resource.

In the United States, 3.5 million homes use electricity generated by water heated deep below the Earth's surface. In recent years, geothermal power has become one of our most important renewable energy resources. Learn how people used geothermal water in the past, how hot water produces electricity today, and how scientists hope to use this renewable resource more in the future.