text: In Paris, France pollution and smog is a big problem.  Source 2 states that Paris has much more smog than other European capital cities. "Paris had 147 micrograms of particulate matter per cubic meter compared with 114 in Brussels and 79.7 in london."  Because of this intense smog Paris created a partial driving ban policy to help clear and clean the city air.  The policy stated that on Monday vehicles with an even-mumbered lincense plate would have to leave their cars at their home or be issued a 22-euro fine.  The next day this rule would apply to odd-numbered licence plates.  As a result to this partial ban the city smog and congestion levels decreased by 60 percent.  Even this partial change benefited the city greatly by reducing smog and poor air quality.