Jan Chwedeńczuk

CO2 level for March

2025:

428.15 ppm

2024:

425.38 ppm

CH4 level for December

2024:

1938.06 ppb

2023:

1931.11 ppb


source:

Earth System Research Laboratory
Global Monitoring Division (NOAA)





retrieved on April 24, 2025 from::

NOAA National Centers for Environmental Information
State of the Climate: Global Climate Report for March 2025
published online April 2025

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