Consider, for example, water. More than half of U.S. water consumption goes to raising beef. It takes 25 gallons to produce a pound of wheat, but 2,500 for a pound of meat. In one day, the diet for a meat eater requires 4,000 gallons of water; for a true vegetarian, only 300. That contrast amounts to real conservation. It also means fewer dams and more water left in streams for beady-eyed fish.
Some 90% of the water pollution that results from organic wastes is attributed to livestock. The inorganic residues of pesticides are also overwhelmingly caused by meat production (55%) and dairy operations (23%). For example, American corn production, which is predominantly oriented toward the feeding of livestock, uses 30 million pounds of toxic chemicals annually to control the corn borer. Only 11% of combined pesticide residuals come from the growing of vegetables, fruits and grains. And even that small percentage should decline as organic gardening and agriculture continue to spread.
Consider greenhouse gases--those carbon dioxides and methane that trap escaping heat and raise the earth's temperature. Many experts say the accumulation of greenhouse gases in the upper atmosphere could lead, in two short generations, to a global warming that will have catastrophic effects--expanding deserts, flooded coastal areas, loss of species and genetic diversity and massive dislocations