So China just almost caught up to Europe as far as CO2 emissions per capita goes and is nowhere close to the US whilst putting measures to reverse the trend. That comparison used to be ridiculous just a few decades ago when they were comparatively massively underdeveloped.
Often this involves the whole blame-shifting where one poses one shouldn't do anything because there's someone doing less/worse. But in this case it's not even true. Not even if they lied about their numbers by