Game theory gives all of us an optimal solution, so we all should care about every bit, no matter the global proportion. Btw. Chians per capital CO2 emission is lower than most of europe.
Yeah but earth is not heating up per capita. And all the developing world emissions are rising. We go to extreme to not even move the needle. Then china takes our factories, because we have expensive energy and stricter safety laws - i am not arguing against it. And europe is left economically decimated.