An engineer releases steam at the two main pips at the KenGen Geothermal Energy Power station in Naivasha, some 117km (73 miles) from the capital Nairobi, January 12, 2009. Geothermal energy is the natural heat stored within the earth’s.The energy is manifested on the earth’s surface in the form of fumaroles, hotsprings and hot and altered grounds. To extract this energy, wells are drillled to tap steam and water at high temperatures (250-350 C) and pressures (600-1200 psi) at depths of 1-3km for electricity generation, the steam is piped to a turbine, which rotates a generator to produce electrical energy. The station produces the bulk of geothermal power produced in Kenya. REUTERS/Antony Njuguna (KENYA)