text: Next, Paris took the no-car rule to another level by banning all cars, depending on the day, to reduce conditions in the air quality because of the emitiones from the vehicles. A thick smof loomed over the city because of the gases produced form the automobiles. Drivers with licence plates with even numbers would not use their cars for the day and odd cars would be off the next in an attempt to redice the smog. After numerous days of reduced cars the smog began clear from it's usual state.