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[–] 12740673? 0 points 1 points (+1|-0) ago 

There’s one somewhere that’s basically flatbed train cars full of concrete blocks, excess power pulls them up a hill, and then they generate power coming down.

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[–] Germ22 0 points 2 points (+2|-0) ago 

sounds interesting, do you have a link for that?

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[–] 12754508? 0 points 1 points (+1|-0) ago