The international meat industry generates roughly 18% of the world's greenhouse-gas emissions—even more than transportation—according to a report last year from the U.N.'s Food and Agriculture Organization ... Global meat production is expected to double between 2001 and 2050. Given the amount of energy consumed raising, shipping and selling livestock, a 16-oz.T-bone is like a Hummer on a plate ... If you switch to vegetarianism, you can shrink your carbon footprint by up to 1.5 tons of carbon dioxide a year, according to research by the University of Chicago. Trading a standard car for a hybrid cuts only about one ton—and isn't as tasty.
From Skip the Steak, a Time Magazine article by Bryan Walsh