yes, but there must be a limit to how big they can get. They are vulnerable now, just think of a temporary black out.
We can't, I think. The anwer must be something like the poor half cut down on babies (which can only be done if they have better chances of survival) and the rich cut down on pollution - which they won't.Get rich and wealthy. So far that's been the best measure to cut down on birth rates. How we can achieve that without exploiting the planet further is yet another question.
Hm!