Geothermal energy, one of the renewable forms of energy today is one that takes advantage of heat beneath the earth’s surface. Deep down in the earth’s crust, there is molten magma (melted rocks) resulting from extreme heat. This heat is able to heat up air spaces and underground water reservoirs. Temperatures 10-15ft below ground level is about 50oF and 60oF year-round, but a lot hotter as it goes further down.