The company that specializes and offers geothermal systems and other earth-friendly and energy-efficient geothermal heating and air conditioning systems to the Phoenix, Arizona metro area is AC by Jay.
In the summer months of June, July and August, Phoenix can be extremely hot. This geothermal cooling solution is the perfect solution for homes to stay cool and comfortable all year round. In fact, we could use this geothermal system over here too.
A little information from the Science Dictionary on Geothermal energy:
Geothermal energy is power generated from natural steam, hot water, hot rocks, or lava in the Earth's crust. In general, geothermal power is produced by pumping water into cracks in the Earth's crust and then conveying the heated water or steam back to the surface so that its heat can be extracted through a heat exchanger, or its pressure can be used to drive turbines.