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Re:Nuclear is back on the table for a green future by ncmncm on Saturday June 18, 2022 @12:46AM (#31787328)
Hint: pumped hydro is, exactly, a gravity battery. A gravity "flow battery", if you like.

It is #1, just now, because a lot already existed. They cost a great deal to build, back when. New ones would cost as much, but a small variation is much cheaper, not needing a dam or a watershed.

A small variation on a bad idea can be a very good idea.

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