In the past, people in the United States used to eat healthy and used to eat freshly 
            
 prepared food and meals with their families.  Today, many young people prefer to eat fast 
            
 food such as high fat hamburgers, high-carbohydrate French-fries, fried chicken, or pizza 
            
 in fast food restaurants; therefore, these same people often suffer from obesity.  "Obesity 
            
 is defined as a condition in which the natural energy reserve of mammal (such as 
            
 humans), which is stored in fat, is expanded far beyond usual levels to the point where it 
            
 is believed to pose la health risk."  (www.society,guardian.co/publichealth/story).  
            
 However, some traditional foods are eaten more often than in the past and many changes 
            
 have occurred, causing serious effects on individuals and society.  Obesity has become a 
            
 major problem in the United States with over sixty percent of Americans being 
            
 overweight.  Obesity can be divided into three main causes – lifestyle, diet and education.
            
      There are many reasons for the popularity of fast food.  One of the main reasons of 
            
 obesity is change in lifestyle.  Many people in the United States are working long hours, 
            
 more shifts or extended school days, and do not exercise regularly.  Therefore, the 
            
 society's attitude toward food and change in lifestyle leads to the over-consumption of 
            
 convenient fast food, causing obesity.
            
      A second cause of obesity is poor diet.  A leading nutritionalist, Professor Thomas 
            
 Sanders, the Director of the Nutrition, Food and Health Research Center, emphasizes the 
            
 need for the balance between activity and the consumption of fast food.  Professor 
            
 Sanders states, "In trials, there is no evidence suggesting the reducing fat intake has an 
            
 effect on obesity.  As long as your expenditure equals what you eat, you will not put on 
            
 weight, regardless of how high the fat con
            
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