Vast amounts of energy, water and land are required to convert vegetation into meat. It takes 5 to 20 calories of fossil fuel to create just one calorie of energy in the form of meat; ¼ to ½ of a calorie of fossil fuel produces one calorie of plant food energy. In other words production of even the least energy-efficient plant food is nearly ten times as efficient as the most energy-efficient animal food. To produce one pound of meat takes an average of 10 tons of water - the amount a small family uses for all purposes in a month.