The NYTimes, peculiarly and I think inappropriately in the "Media and Advertising" section, has an article on the connection between meat and carbon emissions. It's interesting enough. I think the vegetarians have a point, very much unlike the "vegetable-mile" people, who complain about how far your food has travelled, who as I will explain in an article soon, have it fundamentally and deeply wrong.
I don't have much to add right now, except to point out that anyone who wants to follow up on the "University of Chicago Study", given that the Times astonishingly and inexcusably does not even deign to name the researchers (thank you Media and Advertising section) should look for Eshel and Martin, Earth Interactions, Vol. 10, pp. 1-17, March 2006, available here.