China's per capita emissions are about the same as a middle of the road European country, and about 1/2 that of the US. And yes, per capita is a much more rele

China's per capita emissions are about the same as a middle of the road European country, and about 1/2 that of the US. And yes, per capita is a much more relevant measure than per country as far as determining whether or not a given country is emitting over or under its fair share of the world's total emission budget, because the atmosphere does not care about arbitrary political boundaries. If you go per country than any country that is emitting more than its share could simply split into 2 or more smaller countries, without any change whatsoever in the total emissions of that set of people, and go from being over their share to under their share. Doing so slightly lowers the fair share of other countries which might cause some of them to be over, but no problem--they can just split too. The end game for that is a huge number of tiny countries which converges to per capita. Best would be something like per capita with adjustments for trade between countries.