Comment by jacobolus

Chinese CO₂ emissions per capita are only about 60% as much as the USA, but in the past 25 years US per capita emissions have dropped by about a third and Chinese emissions per capita have almost tripled and are still rising rapidly. Considering that China is about 4 times as populous as the US, this is a huge problem for the world. (US emissions are also a huge problem; we all need for them to decrease very quickly.)