The U.S. is the current world leader in geothermal energy.

Groundwater heated by magma may rise to the surface as geysers or hot springs.

Dry steam geothermal power plants extend geothermal availability by pumping water down wells; the hot steam rises to spin turbines and generate electricity.

This may not be sustainable if the groundwater is not recharged.

Ground-source heat pumps can be used to manage building temperatures.