Cow burps and global warming

Vermont dairy farmers have changed their cows' diet to reduce the amount of gas the animals burp. Apparently, cow burps contribute to global warming. Fifteen Vermont farms are working to reduce the cows' intestinal methane by giving them feeds that are high in Omega 3 fatty acids. You may be glad to know that according to research, most of the gas emitted by a cow comes from its front end and not the rear. Stonyfield Farm's Nancy Hirschberg learned from the makers of Dannon products that diet is the key to the mystery. One of the farms has reduced its cows' belches by 13 percent since January.