https://www.smbc-comics.com/comic/2008-01-10

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Pretty sure there's a different smbc about that.

Of course, they conveniently overlook the fact that no material is strong enough to withstand Superman's maximum energy output, so there's a lot of wasted potential left on the table.

Ok math nerds how big of a flywheel does superman need, how fast does it spin and does it have any effect on gravity or the earth's rotation?

SMBC already answered that, YES

https://www.smbc-comics.com/comic/2011-07-13

Rightly regarded by many as one of if not THE best ever SMBC comic ❤️

I think Superman would be more august to be part of humanity's energy transiton. Source, I'm not a comic book reader, so I can just make stuff up about the characters.

Doesn't need to. Ask superman to put a giant ball of salt into space, and then melt it with his laser vision. We're talking moon sized. I don't know if the infrared radiation coming off would cook earth, but assuming it doesn't, we now have a giant ball we can harness the heat energy from from centuries. If it cools, we can have him heat it again.