In order to separate aluminum from bauxite ore, it takes a large amount of electricity. Electricity can be generated by coal, oil, natural gas, running, water, nuclear fuel, and in some cases, solar energy and wind power. Industries must pay for electricity per kilowatt from utility companies, but tend to receive lower rates than typical home consumers. Aluminum typically uses hydroelectric power and factories are located near dams for cheap, large amounts of it. The oldest aluminum production plant that is still operating today was built in Massena, New York by a dam linking St. Lawrence and Grasse rivers in 1902. The company that owns it, Alcoa, is the world’s largest producer of aluminum.