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Atmospheric Greenhouse Gases
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

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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)

January 2025:  1935.33 ppb

January 2024:  1928.35 ppb

Last updated: May 5, 2025

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