Geothermal heat is one of Iceland’s greatest natural resources. The geothermal heat is mostly used to heat fresh water which, when hot, can be utilized directly for central heating. 89% of all the houses in Iceland are heated this way, and 17% of Iceland’s electricity comes from Geothermal Power

To produce geothermal-generated electricity, wells, sometimes a mile (1.6 kilometers) deep or more, are drilled into underground reservoirs to tap steam and very hot water that drive turbines linked to electricity generators.