Current global values of CO2 in the atmosphere

Welcome to the NOAA Carbon Cycle Greenhouse Gases group information website! The central site for global greenhouse gas monitoring and is in charge of operating the global air sampling network that continues to monitor the air we breathe.

22 October 423.75 ppm

21 October 423.74 ppm

20 October 423.73 ppm

19 October 423.73 ppm

18 October 423.72 ppm

Safe concentration: 350 ppm

ppm – the number of particles of carbon dioxide per million particles of air.

Last updated: October 20, 2024

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