I hope you realize that I was kidding in my original post - the call-back to “Spandex jackets” was a clue. But you raise an interesting point. I remember an idea that I heard once about freezers on the floor of the ocean. The freezers would freeze water, and the resulting ice would be attached to some conveyor device that turned as the ice floated towards the surface. The conveyors would turn a generator, generating power to run the freezers and the excess would power our world. Calculations were done and (Yes!) it WOULD work - you would get more power out that you put in. The deficit or friction or the arithmetic factor that enters into all these calculations would be the overall cooling of the entire planet.
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