Indeed, methane is at least an order of magnitude greenhouse gas as C02 : " over a 100-year period, it traps 29 times more heat per mass unit than carbon dioxid

Indeed, methane is at least an order of magnitude greenhouse gas as C02 : " over a 100-year period, it traps 29 times more heat per mass unit than carbon dioxide".[0] [0] http://en.wikipedia.org/wiki/Atmospheric_methane http://en.wikipedia.org/wiki/Atmospheric_methane