It would have some follow-on effect for a while due to shrinking the global economy but over time domestic demand in these countries and other places would pick up the slack.
I think we overestimate how much is proxy emissions even now. Those are whole modern growing societies not just factories for us. Our view of climate change and carbon emission tends to be, like other things, very Euro-and-US centric and provincial.
What I’m saying is that if you turned us off you’d only delay the oncoming train, not stop it.