In an earlier post, I noted the importance of energy storage. I was also surprised by the fact that more than half of this comes from water that is pumped into a reservoir in order to serve as temporary hydropower. Here is an interesting article on the world's largest "battery" of this kind. This is considered by some to be more environmentally-friendly than conventional hydropower in that it can be used in brown fields (such as abandoned quarries) and can be used to supplement intermittent f...
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