The CO2 concentration on Mauna Loa is publicly available, here's a picture and a script that fetches the data to plot it: https://commons.wikimedia.org/wiki/Fi

The CO2 concentration on Mauna Loa is publicly available, here's a picture and a script that fetches the data to plot it: https://commons.wikimedia.org/wiki/File:Mauna_Loa_CO2_monthly_mean_concentration.svg https://commons.wikimedia.org/wiki/File:Mauna_Loa_CO2_monthl... You can compute emission rates from that data yourself.