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Global atmospheric CO₂ concentration

Atmospheric carbon dioxide (CO₂) concentration is measured in parts per million (ppm).

Jan 15, 1980Aug 15, 2021Mar 15, 1987Sep 4, 1992Feb 25, 1998Aug 18, 2003Feb 7, 2009Jul 31, 2014Annually averagedMonthly averaged
Jan 15, 1980
Aug 15, 2021