text: in the second source "paris bans driving due to smog" the city was almost about to reach their record pollution but they enforced a couple days banning to clear air. people would be fine 31$. but 4,000 people didn't listen. but people had their cars impounded for their reaction. diesel full was to blame since france tax policy favors diesel over gasoline. paris is the most pulluted city in europe. but good thing happened the smog cleared up.