A University of Minnesota study says former iron ore mines that have filled with water could become storage sites for energy. Electricity generated when it’s not needed would be used to pump water uphill. Then, when the energy was needed, the water would flow back down through turbines to produce electricity. This photo shows the Hull Rust mine near Hibbing. (1997 file / News Tribune)
Read the article: Old mine pits could store energy on Iron Range
RSS Feeds