Geothermal heating and cooling systems takes heat stored in the ground through the water that circulates in its underground loop. This heat is then carried to the geothermal heat pump where it’s concentrated and then sent as warm air through-out your home. "Numbers from US Environmental Protection Agency (EPA) show that homeowners save 30-70% on heating and 20-50% on cooling costs by using geothermal heat pumps compared to other conventional systems. This translates to roughly $400 to$1,500 annual savings ." - energyinformative.org

For more info on geothermal drilling go to https://igshpa.org/