By Jeanna Bryner, LiveScience Managing Editor
posted: 09 September 2010 09:30 am ET
For scientists concerned about greenhouse gas emissions, cow farts are nowhere near as problematic as their methane-laden belches. Now a new oregano supplement could stem the burps and reduce the potent methane emissions.
Worldwide, cows are responsible for 37 percent of the human-produced methane, according to study researcher Alexander Hristov, an associate professor of dairy nutrition at Penn State University. Most of that methane comes not from the backsides of cows, but from the gas they belch after digesting their food, according to Hristov and the Food and Agriculture Organization of the United Nations.
"The cow 'farts' very little methane," Hristov told LiveScience. "The vast majority of methane is produced in the rumen and is belched out."
Methanogenic bacteria in the rumen, the largest compartment of the four-chambered stomach, break down the material into nutrients. Two of the byproducts are carbon dioxide and methane.
Full article:http://www.livescience.com/animals/cows-belch-methane-greenhouse-gas-supplement-100908.html