Most of the residents in Germany have given up their cars.

Vauban's streets are completely ''car-free'', this means that no one except for the main thoroughfare and a few streets on one edge of the community have cars. This movement is called ''smart planning.''

This movement helps the greenhouse gas emissions in Erope. Passenger cars are reponsible for 12 percent of greenhouse gas emissions in Europe, and up to 50 percent in some car-intensive areas in the United States, this evidence is given in paragraph 5.

David Goldberg states on paragraph 7 that all the development since the World War II has been centered on cars, he is promoting new communities that are less dependent on cars.

In source 2 the autor talks about one of the biggest advantages of limiting car usage, by cleaning the air from pollution. Cold nights ans warm days cased the warmer layer of air to trap car emissions. In Bogota, Colombia they are doing a program that is called ''Car-free'' this is a program that allows people to have a day without using their cars, in souce 3.