Deep Abandoned Mine In Finland To Be Turned Into a Giant Gravity Battery
James Felton reports via IFL Science: One of the deepest metal mines in Europe – the Pyhasalmi Mine in central Finland – is to be turned into an enormous gravity battery capable of storing 2 megawatts of energy. […] Despite the cool name, the idea behind gravity batteries is really simple. During times when energy sources a … ⌘ Read more