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February CO2
Feb. 2025 = 427.09 ppm
Feb. 2024 = 424.55 ppm

December Temperature+1.55°C relative to 1880-1920
2nd warmest December on record

Atmospheric CO₂

February 2024

427.09
parts per million (ppm)

Mauna Loa Observatory, Hawaii (NOAA)

Preliminary data released March 5, 2025

CO2.Earth