Source: Dreamframer / Getty Images
2018
> Carbon dioxide (CO2): 407.58 ppm
> Methane (CH4): 1,857.31 ppm
> Nitrous oxide (N2O): 330.90 ppm
Source: Spiderplay / iStock via Getty Images
2019
> Carbon dioxide (CO2): 411.66 ppm
> Methane (CH4): 1,866.59 ppm
> Nitrous oxide (N2O): 331.88 ppm
Source: Leon Neal / Getty Images News via Getty Images
2020
> Carbon dioxide (CO2): 414.24 ppm
> Methane (CH4): 1,878.95 ppm
> Nitrous oxide (N2O): 333.03 ppm
Source: joiseyshowaa / Flickr
2021
> Carbon dioxide (CO2): 416.45 ppm
> Methane (CH4): 1,895.50 ppm
> Nitrous oxide (N2O): 334.31 ppm
Source: acilo / iStock via Getty Images
2022
> Carbon dioxide (CO2): 418.39 ppm as of June
> Methane (CH4): 1,909.20 ppm as of March
> Nitrous oxide (N2O): 335.40 ppm as of March
