and yet, while A does the right thing, it is possible for B to be encouraged to do the right thing.
For example, China's emissions are mostly caused by 2 things:
A) Smelting plants that use coal.
B) power plants that use coal. Back in the early 90's, China was at 65-75% coal plants. They are now at over 80% and still growing FAST.
The vast majority of that electricity goes into manufacturing, not into civilians.
As such, the smart move is for America (and hopefully the entire west) to tax ALL GOODS predicated on where they come from and the emissions / $GDP (real GDP, not PPP GDP). This will quickly encourage China to change their direction, while at the same time, getting the west to change quicker.