text: Another major advantage of limiting the use of cars is the reduction of air pollution. "Passenger cars are responsible for 12 percent of greenhouse gas emissions in Europe...and up to 50 percent in some car-intensive areas in the United States", Rosenthal writes in "In German Suburb, Life Goes On Without Cars". By driving less, we can reduce our greenhouse gas emissions. "Paris bans driving due to smog," by Robert Duffer, is a prime example of the reduction of air pollution after limiting car usage. "After days of near-record pollution, Paris enforced a partial driving ban to clear the air of the global city", writes Duffer. One Friday, the smog of Paris "rivaled Beijing, China, which is known as one of the most polluted cities in the world". On the following Monday, motorists with even-numbered license plates were ordered to leave their cars at home or suffer a $31 fine. After only one day with less cars on the roads, the smog had nearly dissappeared. This shows that even a day with less cars can make a huge difference in the amount of air pollution. Rosenthal's article, " The End of Car Culture", states that many sociologists believe that if the pattern of less cars continues, "it will have beneficial implications for carbon emissions and the environment" because transortation is America's second largest sourse of carbon emissions. Less air polution is a very important advantage of less cars.