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How Many Tons of CO2 Have Humans released?

Over the entire industrial era, some 2.3 trillion tonnes of carbon dioxide have been released to the atmosphere. About half was dissolved relatively quickly in the ocean or absorbed into the land-based biosphere, while the remainder stayed in the atmosphere.

References

2041 Foundation

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.