Here are couple of articles about it. http://www.npr.org/sections/thesalt/2014/04/11/301794415/gassy-cows-are-warming-the-planet-and-theyre-here-to-stay http://

Here are couple of articles about it. http://www.npr.org/sections/thesalt/2014/04/11/301794415/gassy-cows-are-warming-the-planet-and-theyre-here-to-stay http://www.npr.org/sections/thesalt/2014/04/11/301794415/gas... http://timeforchange.org/are-cows-cause-of-global-warming-meat-methane-CO2 http://timeforchange.org/are-cows-cause-of-global-warming-me...