I wonder even at that point, could we refreeze the earth via megastructure in space, make it miserable for most of us during winters and even summer for a time

I wonder even at that point, could we refreeze the earth via megastructure in space, make it miserable for most of us during winters and even summer for a time to 'reboot' the polar caps/antarctica? Or maybe we could make the mega structure only affect specific locales so the rest of the world doesn't suffer as much from extremely cold spells. I don't think that's the only fix we need though, we'd also need a way to clone and rebuild lost species like penguins and polar bears, and micro organisms, fauna, ocean creatures, etc... Reforestation on a grand scale and global outlawing of Amazon Forest depletion would be a wise thing as well... I think there are science-based solutions but I'm at a loss of how we begin researching and implementing anything esp. w/ our polarized politics of late that could give a shit. I guess when it hurts bad enough we'll stop putting bandaids on things and really try to fix stuff, especially when the entire fate of mankind lies in the balance, until we get to that point sadly it'll probably keep going the way it has been.