» Methane Emissions from livestock    A few facts about animal emissions.    http://www.ciesin.org/TG/AG/liverear.html

» Ruminant Livestock Efficiency Program - US EPA    Ruminant livestock such as cattle and sheep are the largest source of methane emissions resulting from human activity. Methane is a potent greenhouse gas. RLEP is a joint EPA-USDA program helping livestock producers improve their operations' efficienc    http://www.epa.gov/rlep/

» Study: Fish Oil Stifles Greenhouse Gas    CNN reports that Belgian scientists found that adding fish oil to animal fodder could cut livestock release of methane.    http://www.cnn.com/2003/TECH/science/03/12/environment.burping.reut/index.html