… (CH 4 ) and nitrous oxide (N 2 O), and to the fluorinated greenhouse gases HFCs, PFCs, SF 6 and NF 3 (F-gases). However, the Kyoto Protocol contains no measures that … (CH 4 ) and nitrous oxide (N 2 O), and to the fluorinated greenhouse gases HFCs, PFCs, SF 6 and NF 3 (F-gases). However, the Kyoto Protocol contains no measures that …