text: To start, one reason why limiting the usage of cars would be an advantage for our society is the reduction of smog.  Smog is caused by the smoke and fog of car exaust and it is very harming to the environment as well as to humans.  In Paris, in 2014, driving was banned because of smog.  "After days of near-record pollution, Paris enforced a partial driving ban to clear the air of the global city.  On Monday motorist with even-numbered license plates were ordered to leave their cars at home  or suffer a 22-euro (31 dollar) fine.  The same would apply to odd-numbered plated the following day."  (Source 2: Paris bans driving due to smog) This quote from the souce shows that because Paris is such a huge and global city, the amount of cars needed to have the city function in the way society has been making it function for the past years has created serious pollution.  This crazy amount of pollution created smog in Paris.  In fact, according to the article, "[The smog] rivaled Beijing, China, which is known as one of the most polluted cities in the world."  (Source 2: Paris bans driving due to smog)  This type of pollution is know for causing certain kinds of cancer in people, and is what is thought to be the reason for the O-zone hole above Antartica.  Not to mention it makes the day gloomy and not as bright because of the trapped smoke and pollution.  In Vauban, Germany, the "streets are completely 'car-free'" (Source 1: In German Suburb, Life Goes on Without Cars)