Geothermal heating and air conditioning systems uses the heat stored underground in rocks and fluids beneath the earth’s crust. With a geothermal heating system, water is forced underground, heated by the earth’s energy, and conducted back up into your home as steam. This energy can then be used for both heating and cooling. This energy is almost entirely emission free, zero carbon, requires no fossil fuels, and is virtually limitless no matter what time of day or what the weather (unlike solar and wind power).