Global Warming Potentials (IPCC Fourth Assessment Report) Species Chemical formula Global Warming Potential (100 year time horizon) Carbon dioxide CO2 1 Methane CH4 25 Nitrous oxide N2O 298 HFC-23 CHF3 14800 HFC-32 CH2F2 675 HFC-41 CH3F 92 HFC-43-10mee CF3CHFCHFCF2CF3 1640 HFC-125 C2HF5 3500 HFC-134 C2H2F4 1100 HFC-134a CH2FCF3 1430 HFC-143 C2H3F3 353 HFC-143a CF3CH3 4470 HFC-152 CH2FCH2F 53 HFC-152a C2H4F2 124 HFC-161 CH3CH2F 12 HFC-227ea C3HF7 3220 HFC-236cb CH2FCF2CF3 1340 HFC-236ea CHF2CHFCF3 1370 HFC-236fa C3H2F6 9810 HFC-245ca C3H3F5 693 HFC-245fa CHF2CH2CF3 1030 HFC-365mfc CH3CF2CH2CF3 794 Perfluoromethane CF4 7390 Perfluoroethane C2F6 12200 Perfluoropropane C3F8 8830 Perfluorobutane C4F10 8860 Perfluorocyclobutane c-C4F8 10300 Perfluoropentane C5F12 9160 Perfluorohexane C6F14 9300 Perfluorodecalin C10F18 7500 Perfluorocyclopropane c-C3F6 17340 Sulphur hexafluoride SF6 22800 Nitrogen trifluoride NF3 17200