It's not possible for us to work together and fix it, since most of the problem is coming from China, like with most pollution in general. Unless you're proposing something like nuking China.
But you are right, if you want to keep the Chinese poor so they don’t pollute as much as we do, then you’ll need to nuke them because they aren’t going back.
And if you think the problem is just China, wait until India gets it act together. The only real solution we have beyond nuking all the people striving to get rich like us is to figure out how to pollute less and still have rich lifestyles, and China is putting more effort into that than all the other countries combined.