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PraiseBeToScience 3 points ago +3 / -0

Uranium isn't infinite either, however we can build reactors that basically use nuclear fuel to create even more new fuel. It's not perpetual energy but it's about the closest thing.

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mulejuicemcquaid 1 point ago +1 / -0

Fusion would run on the most abundant atoms in the universe. It's a technology that's "just 20 years away" and has been since the 70s, but it should become viable sometime this century.