CO2 emission per capita (2013):
USA 16.5 t
China 7.6 t
So better turn off your electronic devices etc. NOW.
So better turn off your electronic devices etc. NOW.
I think it's fair to point out that the US cutting emissions could have a larger impact than China limiting increases (at least on a per capita basis).
I'd wager that you get much more bang for your buck in China. The US is much more efficient at generating wealth from CO2 emissions: our emissions are about half, while our GDP is somewhat larger. China still has a lot of low-hanging fruit when it comes to cutting CO2 emissions.
In any case, per-capita doesn't matter at all unless you want to come at it from a moral angle.
It certainly shouldn't be the only measure that gets discussion.