Global CO2
Current Trend Data of the global CO2 levels (in ppm) over the last 60 years. A picture is worth 1,000 words.
I pulled this data from climate.nasa.gov
Global CH4
Current Trend Data of the global CH4 levels (in ppb) over the last 40 years. A picture is worth 1,000 words.
I pulled this data from gml.noaa.gov
/ccgg/trends_ch4
Global N2O
Current Trend Data of the global N2O levels (in ppb) over the last 50 years. A picture is worth 1,000 words.
I pulled this data from www.n2olevels.org