Earlier quoted context omitted.
Isn't this what Wall-E was all about?
Nah Wall-E was solar powered and was just supposed to compact trash for incineration. https://pixar.fandom.com/wiki/WALL•E_(character)
Taking care of the best planet around is always going to be easier and better than packing everybody off to some other planet, even one that's just as good.
They way I see it, it's even going to be possible to even collect all the mercury out of the ocean and clean up other seemingly impossible messes.