text: Secondly, limiting car use can reduce pollution. Im almost certain we've all heard about Global Warming and Greenhouse Gases, and the devastation they do to our planet. Withou cars these problems are still present, but lack the massive numbers in which it was rising. Smog is a horrible kind of pollution that affects the biggest cities throught the world. Paris banned cars for an entire day to remove the amont of smog in the area. This shows that pollution can be stopped. Even though they only banned even numbered licenese plates one day and odd another pollution still went down. If all cars were banned then pollution would have gone down even further.