There is a lot of things that cause pollution, but there is one pollution that is imparticular that pertains to these stories and that's air pollution. Air pollution is caused by fossil fuels. So people around the world are cutting car usage to prevent anything bad from happening. The advantages of limiting car usage are less air pollution, more exercies, and little burning of fossil fuels.

In the article "In german suburb, life goes on without cars," by Elisabeth Rosenthal, it says that in Vauban, Germany the residents have given up their cars. In Vauban they are forbidden to use cars. They made everything close together so tha the residents can be at walking distance. "When I had a car I was always tense. I'm much happier this way," said Heidrun Walter. Heidrun is able to walk to any store because it is so close.

In the next article it talks about Paris baning driving. Paris ban driving due to smog. They were using diesel oil since Frane has a tax policy that favors diesel over gasoline. Diesel makes up mor than half of France's vehicles. Paris has more smog than other European capitals. In Paris they had to make people with an odd or even numbered plate stop driving. They let the people with the odd numbered plates drive after the smog cleared up.

In the next article Colombia has their own car-free day. All the people in Colombia are doing outdoor activities that don't involve cars. This is their third straight year that cars are ban. "There was slight rain, but that did not stop people from particpating," said Bogota Mayor Antanas Mockus. For the first time Cali and Valledupar, two Colombian cities joined the event.

In conclusion, These articles generally talk about how some countries are trying to stop people from polluting the air. The advantages of limiting car usage are less air pollution, more exercies, and little burning of fossil fuels.