Not a panacaea but another benefit of aluminium (the correct term for many of us around the world :) is that the process acts as electricity storage, providing a useful way to soak up excess power when it is cheap.
> Electricity in Iceland costs about 30 percent less than what Alcoa might pay in the United States. That’s a crucial consideration, because the Alcoa smelter alone uses more than five million megawatt-hours of electricity each year — about the same as the half-million people and all the businesses in the city of Colorado Springs.
