100% Green and Sustainable Energy� ON Power in Iceland �is a leading power company�that produces electricity, mainly by harnessing geothermal energy, to more than half of the population of Iceland. The company is a world leader in the utilization of geothermal energy, and produces electricity and geothermal water for heating. Renewable power sources account for more than 70% of the total primary energy consumption in Iceland, far higher than anywhere else in the world. The Hellisheidi Power Plant is the largest geothermal single site unit in the world.