This cute video shows how to collect methane from cow poop. You'll have to put up with a dog commercial first, but the following video is worth it. Enjoy!
http://videos.howstuffworks.com/discovery/44809-mythbusters-poo-power-video.htm
Note: Since methane is 20 times worse than carbon dioxide as a greenhouse gas, we must capture it instead of releasing it into the atmosphere.
Edited by greenthriller - 2/17/12 at 11:28am
