It is the major health concern not only in North America but also Europe, Asia as well. If our doesn't get the necessary workout or exercise, then fat in our body gets accumulated. Main reason obesity is the because of the busy schedule of the people, triggered by laziness. Usually the white collar professionals, who work more than 40 hours a week, they are tend to be fatter. To some extent, chemicals also play a part in obesity. I suggest walking a mile everyday would be a simple workout for everyone to remain healthy and fit.