text: In other cities where polution is very high, bans on car usage are coming into place very well. Citizens are discouraged by law to operate personal forms of transportation on certain days. This came into place in Paris after the whole city was drowned in smog. Smog is the pollution exerted from cars and mixed with fog. Although some people did break the law to use their car, it worked for the most part. Many people do not realize the the effect polution has on the environment until they are able to see pshysical change. That is why the world must act now before pshysical change can be seen globaly.