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Atmospheric Greenhouse Gases
Trends in Atmospheric Carbon Dioxide
Monthly CO2 Average  (NOAA Data Source)

February 2025:  427.09 ppm

February 2024:  424.51 ppm

Last updated: Mar 5, 2025

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History of atmospheric carbon dioxide from 800,000 years ago until the end of the most recent GLOBALVIEW+ CO2 collection

Source: NOAA Global Monitoring Laboratory

Trends in Atmospheric Methane
Global CH4 Monthly Means   (NOAA Data Source)

October 2024:  1942.94 ppb

October 2023:  1930.61 ppb

Last updated: Feb 7, 2025

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