Also, according to this, China's per capita emissions are half that of the US. https://en.wikipedia.org/wiki/List_of_countries_by_carbon_di...
Emissions per GDP is probably the best we have as GDP is a decent proxy for productivity, making it a real measure of efficiency. If the goal is to actually reduce emissions the goal must be to reduce CO2 emitted per unit of productivity, so you want to emulate the wealthier nations that have low CO2/GDP scores. That means emulating policies like renewable energy, efficiency standards, well designed cities, etc.
China is (last I looked) the least efficient large economy in terms of pollution per GDP. The USA is toward the middle of the pack.
That's the story of every country's industrial development since the British industrial revolution. Bread comes first, clean water and air come second. For rich western countries to forget that and demand that China and India put environment ahead of pulling people out of poverty is myopic at best and, realistically, highly hypocritical.
I disagree with that point.
China is also the top source of plastic in the ocean.
Tangent but: the way China turned out has IMHO been the major factor in the collapse of the post cold war neoliberal narrative in the West. The idea was that freedom and prosperity are a reinforcing cycle has been disproven. China shows that at least the business parts of capitalism work just fine without human rights and that therefore prosperity and totalitarianism are compatible.
The collapse of that narrative has in turn unleashed a revival of hard right fascist and hard left socialist ideology in the West.