text: Cars can either be a blessing or a mistake. Cars can tend to put out polluting gases, and endanger our earth. In Paris, all driving was banned due to smog. On a Monday, motorisits with even-numbered license plates were ordered to leave their cars at home or suffer a $31 fine. The same would apply to the odd-numbered plates the following day. The car emissions were trapped by a warmer layer of air, because of cold nights and warm days. Congestion in Paris, France wa down 60 percent after just five-days of intensifying snog. This caused the smog to rival Beijing, China, which is known as one of the most polluted cities in the world. That's pretty bad to be competing with China. The Monday where all cars were banned, the smog cleared enough for the ruling French party to rescind the ban for odd-numbered plates the following day.