Atmospheric CO2
Monthly CO2 Average at Mauna Loa  (Source)

October 2021:  413.93 ppm

October 2020:  411.51 ppm

Last updated: November 5, 2021

co2_trend_mlo 1021.png
co2_data_mlo 1021.png

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

Source: NOAA Global Monitoring Laboratory