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I think I recently read about concerns around what would happen if core of earth cooled down. Hopefully that wasn't the case...

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You really need to look up how deep the earth's core actually is and how little we have been scratching on the surface.

people used to say that exact same thing about climate.

Yes, Earth is deep. So is our species' hunger for more. This scenario has played so many times but surely this is different! It's "limitless" energy. Eat the hype and ignore (well, downvote) all concerns.

to put the numbers into perspective, oceans will boil off much sooner than the mantle cools down in any noticeable fashion due to human activity just due to waste heat. in fact, it'll only take ~400 years of 2.3% yoy growth of energy usage. don't tell economists!

https://dothemath.ucsd.edu/2011/07/galactic-scale-energy/

It took a few hundred years of industrial activity to noticeably move the needle on atmospheric warming. The atmosphere is tissue paper to the inconceivable deep ocean that is the Earth’s mantle.

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