Ground-source heating/cooling is quite different from geothermal heat or power. With ground-source, you just have a heat pump like an ordinary air conditioner,

Ground-source heating/cooling is quite different from geothermal heat or power. With ground-source, you just have a heat pump like an ordinary air conditioner, but using the ground as the heat sink instead of outside air. A couple of meters is deep enough. It's nothing like prospecting for the rare resource of accessible hot rock or natural steam, as in Iceland.