After Meat: The Case for an Amazing, Meat-Free WorldAnimals make for terrible technology. The technological use of animals making food, drugs, clothing, and cosmetics out of animal material will cease. A cow takes over one year to grow, "wastes" over ninety percent of what it's fed, and cannot be innovated much further. After Meat explains the fundamental limits of animal technology in terms of physics and biology. Replacement technology such as microbial fermentation will surpass those limits.