text: After near-record polution in Paris, the city enforced a partial ban on car use to help clear the city's air. On Monday, morotorists with an even numbered plate were told to leave their car come, or be fined. and on that Tuesday, people with odd numbered plates would have to do the same. Because of that, nearly 4,000 people were fined. And 27 people had their cars impounded due to the way they acted upon being fined. Though it left some unhappy people, it did help; the congestion was down by 30% in the city.