These transformations are tied to the changing American diet. Since the early 1980s, America’s per-person cheese consumption has doubled, largely in the form of mozzarella-covered pizza pies. And last year, for the first time, the average American ate 100 pounds of chicken, twice the amount 40 years ago.
No: chicken eats about 2 calories for each calorie of bird you get. With beef, the cow eats 10x. Cheese is similar.