text: How much people use their cars is very important. Polluted air is a very widespread problem in many regions of the world. Paris had days of near-record pollution, and decided to enfore a partial driving ban to try to help clear the air of the city. The article says that almost 4,000 drivers were fined, and twenty-seven had their cars impounded for their reaction to the fine. "Congestion was down 60 percent in the capital of France, after five days of intensifying smog." The driving ban helped clear the smog, because it reduced car emissions. Paris has more smog than many other European capitals, which is why reducing how much citizens drive their cars is a good idea.