...A one-pound box of prewashed lettuce contains 80 calories of food energy. According to Cornell ecologist David Pimentel, growing, chilling, washing, packaging, and transporting that box of organic salad to a plate on the East Coast takes more than 4,600 calories of fossil fuel energy, or 57 calories of fossil fuel for every calorie of food.
Michael PollanFood consists not just in piles of chemicals; it also comprises a set of social and ecological relationships, reaching back to the land and outward to other people.
Michael Pollan