date:Aug 06, 2015
y estimates that methane from livestock makes up 25 percent of the total methane emissions in the
United States. Globally, according to the United Nations' Food and Agriculture Organization, animal agriculture emits 44 percent of the methane produced by human activity. Fermentation in the rumen -- one of the four stomach chambers of livestock such as cattle, sheep and goats -- generates the methane, as a result of microorganisms that aid in the process of digestion. The animals must expel the g