Here are additional links that consider connections between animal-based agriculture and global climate change.
The complete United Nations Food and Agriculture Organization report can be downloaded here (7.5 megabyte PDF file).
Livestock's role in climate change and air pollution (from the FAO's 2006 report Livestock's Long Shadow)
EarthSave: A New Global Warming Strategy
Another Inconvenient Truth: Meat is a Global Warming Issue
Another Inconvenient Truth: In the modern world, it is impossible to reconcile a carnivorous diet with environmental responsibility
Warming Up to a New Diet
Diet, Energy and Global Warming
ABC News: Meat-Eaters Aiding Global Warming?
Greenpeace: On Your Plate
Fight Global Warming by Going Vegetarian
Vegan diets healthier for planet, people than meat diets
The SUV in the Pantry
Physics World: Cut Global Warming by Becoming Vegetarian
Five Food Choices for a Healthy Planet
Eco-Eating: Eating as if the Earth Matters
Vegetarian is the New Prius