text: To begin with, the answer to why we should limit the use of cars is stated in the form of pure science: pollution. All around the world, from North America to Asia, every continent has a majorly polluted city. Beijing, London, Mexico City, Miami, New York City, you name it! Major cities nowadays are becoming more polluted than ever before, due to gasoline and diesel fuel used in cars today. Overpopulated cities can have too many cars, and too many cars driven can increase the amount of polluted air around us. In document two, the capital of France, Paris, is home to almost ten million people. After days of an almost-broken record amount of pollution intoxicating the city, Paris enforced a driving ban for two days. Cars and motorcycles were forced to be left at home, or a steep fine will be charged. Even though almost 4,000 drivers were fined, congestion in Paris decreased by nearly 60%, after intense smog. Diesel fuel was the culprit to this pollution, due to France's tax policy that favors diesel fuel rather than gasoline. Diesel fuel cars make up about 67% of cars in France, comparing to an average 57% of diesel engines in Western Europe, according to Reuter's. The smog cleared enough on Monday for the French politicians to rescind the ban. In document three, Columbia's capital city, Bogota, had a goal to promote alternatives to personal transportation and reduce the amount of smog throughout the city. Day Without Cars was born, one day every month where cars are not allowed to be driven, or a fine will be charged. The turnout of people was immense, even though rain showers and thunderstorms poured onto the event. Mayor Antanas Mockus stated that the Day Without Cars "was a good opportunity to take away stress and lower air pollution." Parks and sports centers rose from the city streets, and sidewalks have been paved for bicycles and ongoing pedestrians. Limiting car usage is not be a bad thing, considering we need the air we already breathe.