Cow farts collected in plastic tank for global warming study

"Experts said the slow digestive system of cows makes them a key producer of methane, a potent greenhouse gas that gets far less public attention than carbon dioxide.

In a bid to understand the impact of the wind produced by cows on global warming, scientists collected gas from their stomachs in plastic tanks attached to their backs."

http://www.telegraph.co.uk/news/newstopics/howaboutthat/2274995/Cow-farts-collected-in-plastic-tank-for-global-warming-study.html