Methane (CH4) is emitted from a variety of both human-related (anthropogenic) and natural sources. Human-related activities include fossil fuel production, animal husbandry (enteric fermentation in livestock and manure management), rice cultivation, biomass burning, and waste management. These activities release significant quantities of methane to the atmosphere. It is estimated that more than 50 percent of global methane emissions are related to human-related activities. Natural sources of methane include wetlands, gas hydrates, permafrost, termites, oceans, freshwater bodies, non-wetland soils, and other sources such as wildfires.

Top Sources of Methane Gas:

Enteric Fermentation, Landfills, Natural Gas Systems, Coal Mining, Manure Management, Petroleum Systems, Wastewater Treatment, Stationary Combustion, Rice Cultivation, Abandoned Coal Mines, Mobile Combustion, Composting, Petrochemical Production, Field Burning of Agricultural Residue, Iron & Steel Production, Ferroalloy Production, International Bunker Fuels