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Which Country emitted the Most CO2 Cumulatively?

By the end of 2021, the US will have emitted more than 509GtCO2 since 1850. At 20.3% of the global total, this is by far the largest share and is associated with some 0.2C of warming to date.



Tina Baumgartner Tina leads OpenAir's CDReality mission, and brings to this effort years of career experience in business development, writing and communications in the tech sector. She is based in the Bay Area.