The thing is it's not _their_ production needs if they are the factory of the world.

If the US put a 1000% tariff on Chinese goods tomorrow, emissions in China would likely go down a decent amount, right? But is that an indicator of their production needs? Or the US's consumption patterns?

Not that this is some bilateral thing, there's a lot of people buying a lot of stuff from many places. Just thinking about a very simple example, and how I would like to see quantification on this front, but I don't know how doable it really is.