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Trends in Atmospheric Carbon Dioxide
Monthly CO2 Average (NOAA Data Source)
April 2025: 429.64 ppm
April 2024: 426.51 ppm
Last updated: May 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 CH4 Monthly Means (NOAA Data Source)
January 2025: 1935.33 ppb
January 2024: 1928.35 ppb
Last updated: May 5, 2025



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