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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.

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.