text: In Paris, near-records pollution caused by smog, forced city leaders to take action, banning all cars in a 2 day period; and fining all violators of this new ban. This limited congestion in the capital by 60%. Free public transit was also issued for the exception of the ban, even though almost 4000 drivers were fined and some had their cars impound; which certainly helped the number of pollutants on the streets. The smog cleared enough on monday, to where all odd numbered plates were free of the ban on tuesday. These notacable enviromental effects were so substantial in such a short amount of time, that it could spawn a whole new wave of car banning cities to help thier local enviroment. If every city was based around this ideal, it would help their local enviroment, ultimatly helping their economic industries. Globally, this would make a huge change in the world wide market and decrease greenhouse gases.