Your insistance on the validity of anthropogenic global warming prompted me to recall that methane's effect is 21 times the effect of carbon dioxide and to show or link their relative concentrations in comment# 1, courtesy of the EPA.
Your insistance on the validity of anthropogenic global warming prompted me to recall that methane's effect is 21 times the effect of carbon dioxide and to show or link their relative concentrations in comment# 1, courtesy of the EPA.
This is the radiative forcing due to various factors. Methane's contribution is about 1/3 of CO2's contribution. Controlling methane would be useful and I believe that Jim Hansen includes it in his "alternative scenario" -- even though I posted a link to it earlier today I haven't read it for a couple of years, so I'm not sure.