 Kenya has been estimated to contain 10,000 MWe of potential geothermal energy, and has twenty potential drilling sites marked for survey in addition to three operational geothermal plants.Kenya was the first country in Africa to adopt geothermal energy, in 1956, and houses the largest geothermal power plant on the continent, Olkaria II, operated by Kengen, who also operate Olkaria I.A further plant, Olkaria III, is privately owned and operated.