Scientists and doctors say that more than half of all Americans are too fat Why is this? One cause is the kind of food Americans eat. Many Americans like fast foods These foods often are full of tat and sugar Another cause is the way Americans eat Their little snacks between regular meals add extra fat to the body. A third cause is too little exercise. Many Americans the to drive everywhere. In their homes, they lie on the couch and watch TV They do not even get up to change channels they use the remote control.