Sources and sinks of methane Sources Natural: end-product of the metabolism from an anaerobic bacteria, methanogen Natural wetlands, enteric fermentation( wild animals), termites, biomass burning, ocean/fresh water Man-made: rice paddies, gas drilling and transmission, landfills, coal mining biomass burning, enteric fermentation domestic animals) sink:OH+CH4→CH3·+H2OSources and sinks of methane • Sources – Natural: end-product of the metabolism from an anaerobic bacteria, methanogen. Natural wetlands, enteric fermentation (wild animals), termites, biomass burning, ocean/fresh water – Man-made: rice paddies, gas drilling and transmission, landfills, coal mining, biomass burning, enteric fermentation (domestic animals) • Sink: OH+ CH4→ CH3. + H2O