These days, technology is developing really fast, and we can see most of the people who live in society have cars; as a result, the number of air pollution has been increasing, so a group of people believe when we have an international car-free day then we can decline the effect of this evidence; however, other populations think we can use some ways which have more influence. In my opinion, the first idea cannot solve this problem, but when companies change their way and car companies produce vehicles with less pollution we can solve this issue.