Dear Editor, Neighborhood characteristics can affect people's activity. For example, some neighborhood characteristics may cause people to spend more time at home and not perform outdoor activities. Therefore, this may lead to obesity by reducing physical activity and increasing sedentary life and food intake. Research shows that neighborhood characteristics are at least as important as individual characteristics in determining the likelihood of obesity. When the design of a neighborhood hinders physical activity, it causes obesity. In other words, environment structure influences behavior and health outcomes (1). . .