It's only 2x if you consider the annual emissions, but the CO2 stays in the atmosphere. If you consider cumulative CO2 emissions, the US was around 3 times as h

It's only 2x if you consider the annual emissions, but the CO2 stays in the atmosphere. If you consider cumulative CO2 emissions, the US was around 3 times as high as China (with data up to 2015) https://www.thelancet.com/journals/lanplh/article/PIIS2542-5196(20)30196-0/fulltext https://www.thelancet.com/journals/lanplh/article/PIIS2542-5... But with more up-to-date data, it could be even 8x https://goodlife.leeds.ac.uk/related-research/atmospheric-appropriation/ https://goodlife.leeds.ac.uk/related-research/atmospheric-ap... (Depending if you count cumulative emissions from 1960, earlier or later)