At present the meat industry not only inflicts untold misery on billions of sentient beings but is also one of the chief causes of global warming, one of the main consumers of antibiotics and poison, and one of the foremost polluters of air, land, and water. According to a 2013 report by the Institution of Mechanical Engineers, it takes nearly four thousand gallons of fresh water to produce a little over two pounds of beef, compared to the seventy-five gallons needed to produce the same weight of potatoes.