Geothermal resources are reservoirs of hot water/brine or water steam that exist or are human-made at varying temperatures and depths below the earth’s surface. Wells ranging from a few feet to several miles deep can be drilled into underground reservoirs to tap steam and hot water/brine that can be brought to the surface for use in a variety of applications[1].
For example, in the urban context, we can make direct use of this geothermal energy for district heating.
Source:
French