Obesity is related to what a person eats and how much that person eats but not necessarily to where a person eats. Fast food joints are bad for you, don't get me wrong. But access to fast food doesn't make a person fat. In fact, some studies show that fast food joints may be no worse than other restaurants...or even your own kitchen. The key is to make healthy choices everywhere you go, including the supermarket. Of course, often this is easier said than done.