If you are talking about the CO2 portion of it and focusing on the artificial sources than here is the chart you are looking for: http://www.epa.gov/climatecha

If you are talking about the CO2 portion of it and focusing on the artificial sources than here is the chart you are looking for: http://www.epa.gov/climatechange/ghgemissions/sources.html http://www.epa.gov/climatechange/ghgemissions/sources.html Obviously you are missing out on natural sources for CO2, and the rest of the gases as well: Water vapor (H2O) Carbon dioxide (CO2) Methane (CH4) Nitrous oxide (N2O) Ozone (O3) Chlorofluorocarbons (CFCs)