Selected sources of non-C02 greenhouse gas
Methane (CH4) Nitrous Oxide (N20) High GWP Gases (HFCs, PFCs, SF6)
Landfills

Coal mining

Natural gas & oil systems

Livestock (enteric fermentation)

Livestock manure management

Wastewater treatment

Rice cultivation

Biomass combustion

Fossil fuel combustion
Agricultural Soils

Adipic and nitric acid production

Fossil fuel combustion

Livestock manure management

Human sewage
Substitutes for ozone-depleting substances (HFCs, PFCs)

Industrial activities, including:

semiconductor manufacturing (PFCs, SF6, HFCs)

electrical transmission & distribution (SF6)

aluminum production (PFCs)

magnesium production (SF6)