Vegetarianism beats the Prius in climate change race

Going veg provides more bang for your buck than driving a Prius. Plus, that bang comes a lot faster. The Prius cuts emissions of carbon dioxide, which spreads its warming effect slowly over a century. A big chunk of the problem with farmed animals, on the other hand, is methane, a gas which cycles out of the atmosphere in just a decade. That means less meat consumption quickly translates into a cooler planet.

Not just a cooler planet, also a cleaner one. Animal agriculture accounts for most of the water consumed in this country, emits two-thirds of the world's acid-rain-causing ammonia, and it the world's largest source of water pollution--killing entire river and marine ecosystems, destroying coral reefs, and of course, making people sick. Try to imagine the prodigious volumes of manure churned out by modern American farms: 5 million tons a day, more than a hundred times that of the human population, and far more than our land can possibly absorb. The acres and acres of cesspools stretching over much of our countryside, polluting the air and contaminating our water, make the Exxon Valdez oil spill look minor in comparison. All of which we can fix surprisingly easily, just by putting down our chicken wings and reaching for a veggie burger.