Geothermal energy offers abundant, highly flexible and clean electricity supplies that can support variable renewable technologies such as wind and solar while complementing other low-emissions sources like nuclear. Today, geothermal meets about 1% of global electricity demand. However, based on a new first-of-its-kind country-level analysis, conducted in collaboration with Project InnerSpace, the IEA report shows that next-generation geothermal technologies have the technical potential to meet global electricity and heat demand many times over.