Forty percent of the food produced in the U.S. goes uneaten. From "farm to fork", there are many reasons for food waste, including consumer demand for perfect produce and confusion over expiration dates printed on packaged foods. This massive waste occurs as one in six Americans struggles with hunger every day, even in affluent regions such as Silicon Valley.
Given today's environment, it is surprising that there are still thin people around. The origins of this epidemic are pretty easy to spot—lots of food and less opportunity for exercise. And yet, not everyone in the U.S. is overweight. So why is one person fat and the next thin?