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The US (4% of the world's population) has caused about 20% of all historical greenhouse gas pollution to date. Because global temperature rise scales linearly with historical greenhouse gas pollution, the US bears outsized responsibility for causing climate change - and therefore for fixing it.

Analysis: Which countries are historically responsible for climate change? - Carbon Briefwww.carbonbrief.org Carbon Brief looks at national responsibility for historical emissions of CO2 from 1850-2021, updating analysis published in 2019.

carbon brief has gotta regularly update this analysis. really good, really useful. have used it in dozens of talks to the public