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Tacoma Chapter
Our solution to climate change? Democracy.
Trends in Atmospheric Carbon Dioxide
Global Monthly Mean CO2 (NOAA Data Source)
June 2025: 425.83 ppm
June 2024: 423.22ppm
Last updated: Sep 5, 2025
History of atmospheric carbon dioxide from 800,000 years ago until the end of the most recent GLOBALVIEW+ CO2 collection
Trends in Atmospheric Methane
Global Monthly Mean CH4 (NOAA Data Source)
May 2025: 1933.54 ppb
May 2024: 1925.71 ppb
Last updated: Sep 5, 2025
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