text: In source 2, in some countries exist prblems with traffic in the strees. One example is Paris ," 4,000 drivers were fined , according to Reuters ,27peoplehad their cars impounded for their reaction to the fine. But the traffic go down 60 percent in the capital of France , after 5 days of intensifying smog . But of course  some countries have more that others , for example Paris typically has more smog than others europrean capitals , "Paris had 147 micrograms of particulate matter ,per cubir meter compared with 114 in Brussels and 79.7 in London , Reuters found .