Geothermal power (from the Greek words geo, meaning earth, and thermal, meaning heat) is energy generated by heat stored beneath the Earth’s surface or the collection of absorbed heat derived from underground in the atmosphere and oceans. It is a clean, renewable resource that provides energy in the United States and around the world. It is considered a renewable resource because the heat emanating from the interior of the Earth is essentially limitless. The heat continuously flowing from the Earth’s interior is estimated to be equivalent to 42 million megawatts of power (Energy and Geosciences Institute, University of Utah).