[Lazarus]

From the article:

It means that the amount of gas you use isn't just related to how you get from place to place, it's also related to what you eat. Meatless diets require half as much fuel to produce than the standard American diet. Pimentel calculated that if the entire world ate the way the U.S. does, the planet's entire petroleum reserves would be exhausted in 13 years. The typical American could save more gas by going vegan than by giving up driving two days a week.5

Those who think the question is, "Is it better for me to drive, or (eat a wasteful diet and) walk?" are missing the point. That's like asking whether it's better to pour oil or pesticides into the water supply. Ideally you shouldn't do either. To greatly reduce your energy and pollution footprint, you should reduce or eliminate consumption of animal foods -- no matter how you get around