In Source One the story talks about the advanges of redusing car usage in the German areas. It states that cars produse about 12% of greenhouse gas in Europe and about 50% in major car usage areas in the United States. Also, street parking is generally forbidden on the outskirts of Freiburg. Even though Vauban's street are completly "car-free", except the main thoroughfare. Car ownership is allowed, but there is only two places to park, in a large garage outside their development where a space costs $40,000, or in their own homes. Because of this, about 70% of families in Vauban don't own car(s). Along with 57% of people that sold their car so they could move to Vauban.

In Source Two, in Paris, everyone who drove a car was fined, in two days about 4000 peopole were fined? That isnt actually a alot for a whole city, which is great news. Paris uses diesel fuel instead of gasoline, and now Paris is blaming that on their air pollution. Paris usually has more smog than any other European capital.

In Source Three, Bogota, Colombia has the Day Without Cars, where only public buses and taxis are allowed to drive in the city, anyone driving a car will be fined $25. the Day Qithout Cras started in the mid-1990s, and since then 118 miles of bicycle paths have been built. Parks and sport areas have also been built, along with more restaurants and shops near streets that used to be heavy with traffic, but now leave room for people to stop and visit.

In Source Four, it states that in the United States, young people driving decreased by 23% between 2001 and 2009. Recent studies show that Americans are buying fewer cars and getting fewer licenses each year.