Answer: B) 3,000 pounds of CO2/year
It turns out that one of the easiest and cheapest ways of lowering one's carbon footprint is to simply eat less meat. In fact, the average meat eater is responsible for 3,000 pounds of CO2 per year more than a vegetarian. That's because livestock produce a lot of methane, a greenhouse gas 20 times more potent (and smelly) than carbon dioxide. Also, it takes a lot of energy, water and food to produce meat.