Carbon dioxide (CO₂) averaged ~418 ppm in November 2022.

10 years ago November averaged ~393 ppm.

+ Preliminary data: https://gml.noaa.gov/ccgg/trends/

Trends in CO2 - NOAA Global Monitoring Laboratory

GML conducts research on greenhouse gas and carbon cycle feedbacks, changes in aerosols, and surface radiation, and recovery of stratospheric ozone.