Part of the reason USA is clean is because it has exported factories to asia. The US did clean up a lot through regulation too, so it’s not just outsourcing, but global supply chains definitely move some of the environmental cost around. Not pointing any fingers and the asian countries did accept those industries of their own free will because there's money in it but it isn't as simple as you say it is. Earth is a giant room. Other countries don't exist in a different universe. Same thing is happening with data centres now. They're being criticised in the USA because of environmental concerns but india is welcoming them. It's the cost of being poor. You gotta choose between two bad options and pick the one that is less bad.