text: In conclusion the absence of personal automobiles would greatly reduce the air pollution in most major cities. Beijing could become it's once beautiful city, and Paris wouldn't have to ban driving because of thickened smog. The United States would also never have problems with smog, and we would also reduce air pollution by 50%. Communities like Vauban and Bogota are prime examples of people who do not need cars to survive. They are stress free, and much happier than most car driven societies. Personal cars do much more harm, than good. This is why we do not need to rely on the use of personal cars.    Dear TEACHER_NAME,