text: One of the most populated city in France is Paris. Paris enforced a driving ban to clear up the polution. A 22-euro fine was given if one failed to corespond with the rules. Around 4,000 drivers were fined and 27 people had their cars impounded for their reaction to the fine . After 5 days of almost car free roads (not including bus and taxis) the traffic went down by 60 percent.(Source 2). The biggest problem of the smog was Diesel fuel. Diesels make up 67 percent of vehicles in France compared to the rest of Western Europe that has 53.3 percent average on Diesel.