Atmospheric Greenhouse Gases
Trends in Atmospheric Carbon Dioxide
Monthly CO2 Average at Mauna Loa  (Source)

April 2022:  420.23 ppm

April 2021:  419.05 ppm

Last updated: May 5, 2022

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History of atmospheric carbon dioxide from 800,000 years ago until January, 2019

Source: NOAA Global Monitoring Laboratory

Trends in Atmospheric Methane
Global CH4 Monthly Means (Source)

January 2022:  1908.9 ppb

January 2021:  1890.7 ppb

Last updated: May 5, 2022

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