text: Second off, Motorized vehicles are causing a lot of smog. "Congestion was down 60 percent in the capital of France, after five-days of intesifying smog"(S2P14). This quote shows that the smog is building up because of cars. "motorists with even numbered license plates were ordered to leave their cars at home or suffer a 22 euro fine"(S2P11). This quote shows that they weren't kidding about no more cars. The cars were causing harm to the beautiful city.