Here are a bunch of resources linking meat-eating to global warming
(and how to fight global warming with your fork):

Another Inconvenient Truth
http://www.eatkind.net/inconvenient.htm

EarthSave: A New Global Warming Strategy
http://www.earthsave.org/globalwarming.htm

Another Inconvenient Truth: Meat is a Global Warming Issue
http://www.emagazine.com/view/?3312

ABC News: Meat-Eaters Aiding Global Warming?
http://abcnews.go.com/Technology/TenWays/story?id=2119267&page=1

Greenpeace: On Your Plate
http://www.greenpeace.org/usa/news/green-living-guide/on-your-plate

Fight Global Warming by Going Vegetarian
http://goveg.com/environment-globalwarming.asp?int=weekly_enews

Vegan diets healthier for planet, people than meat diets
http://www-news.uchicago.edu/releases/06/060413.diet.shtml

The SUV in the Pantry
http://www.organicconsumers.org/btc/gasfood112105.cfm

Cut Global Warming by Becoming Vegetarian
http://www.physorg.com/news4998.html

Five Food Choices for a Healthy Planet
http://www.veg.ca/issues/enviro-5reasons.html

and

Eco-Eating: Eating as if the Earth Matters
http://brook.com/veg