Global atmospheric CO₂ concentration

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

Jan 15, 1979Oct 15, 2024Mar 15, 1987Sep 4, 1992Feb 25, 1998Aug 18, 2003Feb 7, 2009Jul 31, 2014300 ppmMonthly average
Global atmospheric CO₂ concentration

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