Use these calculators to see the impact you have made being vegan or vegetarian. Vegan and vegetarian lifestyles require less resources like water, food, oil, contribute less CO2 to the atmosphere, and animals are not killed for their consumption. Raising livestock contribute more to global warming than automobiles, and is the second leading cause of global warming behind industrial pollution. Choosing to become vegan or vegetarian is one of the best things you can do for the environment. You might also want to check out our Website Carbon Footprint Calculator.