Grain-fed
livestock consume 100,000 liters of water for every kilogram of food
they produce, compared with 2,000 liters for soybeans.
Animal
protein also demands tremendous expenditures of fossil-fuel energy -
eight times as much as for a comparable amount of plant protein. Put
another way, says Pimentel, the average omnivore diet burns the
equivalent of a gallon of gas per day - twice what it takes to produce
a vegan diet.
Time Magazine, “Should You Be a Vegetarian?”, July 2002