Bye Bye Meat

This morning I saw a video on CNN trying to convince people to "go Vegetarian & Save The Planet." Their argument is that cows and other "meat" animals produce large amounts of greenhouse gasses, and eliminating them from our diet is the only way to slow global warming. What do you guys think of the video's argument???

Here is a link:
http://www.cnn.com/video/#/video/tech/2009/10/27/martel.climate.change.meat.itn