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Humans can light the earth on fire with thousands of nuclear explosions. Almost nothing would survive. I’d say we’re well past natural. But your ways less extreme.



A long long time ago some organisms “polluted” the athmosphere with oxygen. It wasn’t a natural event in your opinion?


An asteroid can hit the earth and do the same thing. Is it not natural either?


And cyanobacteria transformed the entire atmosphere, to such a degree that almost everything else died out: https://en.wikipedia.org/wiki/Great_Oxygenation_Event




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