A Colorado-based wind company is testing a wind turbine to be used for water purification with the Platte River Power Authority near Fort Collins. Four Winds Energy Corp, founded in 1992, is teaming up with Global Water Technologies (GWT) of Texas to produce a self-powered water purification machine that charges batteries with 3600 watts of power. "If you take it into a remote area and gasoline or diesel fuel isn't available, the only way it's going to work is solar or wind power," said GWT's Harold Fife to the Fort Collins Coloradoan newspaper. GWT is negotiating to sell units to the US Army. The largest unit costs $50,000, about one-fifth of the Army's existing purification systems. The turbine costs eight cents to produce a kilowatt-hour of electricity, says Dillyn Elder of Four Winds. The system is soon to be tested in famine zones in Africa. The wind generator costs about $21,000.