As it turns out, what you eat may be more important than what you drive. Industrialized agriculture is very fuel intensive. Millions of gallons of diesel are used to grow and harvest corn of which 76 percent go to feed animals. This corn is then shipped to feedlots. Animals are then shipped to slaughterhouses. Carcasses are shipped to packing plants. Meat is then shipped to your grocery. Animals also emit lots of greenhouse gases. So, as you can tell, there's a lot of fossil fuel burning going on in the name of a hamburger for lunch. Gidon Eshel and Pamela Martin have been studying the environmental impact of dietary choices and being a vegan is not surprisingly the most sustainable diet. In fact, the carbon footprint difference between a vegan and someone who gets 50% of his/her calories from meat is similar to the difference between driving a small car and an SUV.
We all knew that being vegetarian was better for our health and less cruel to animals - now we know that its better for the planet as well.