The 70 percent of vouban's families do not own cars, and 57 percent sold a car to move there.

The lifes with no cars is more happines. "when i had a car i was always tense. I'M much happier this way" (said Hedrun Walter). The 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. After days of near-record pollution,paris enforced a partial driving ban to clear the air of the global city. Paris typically has more smog than other European capitales. In Bogota Colombia exist a program call "car-free". This program is about try to clean de globalcity, this program works to the next form: In a program that's set tospread to other countries, millions of Colombians hiked,biked,skated or took buses to work during a car-free days. Bogota create this program because the smog of the car is alot than the global city  was to dark,the tournut was large, despite gray clouds than dumped occasional rain showers on Bogota. "It's goog opportunity to take away stress and lower air pollution,"(said businessman Carlos Arturo Plaza as he rode a two-seat bicycle whith his wife. When the program starts for the first time other Colombian cities, Cali and Valledupar ,joined the event. This program or campaing that began in Bogota in the mid-1990s. It has seen the construction of 118 miles of bicycle paths, the most of any latin American city, acording to Antanas Mockus,the city's mayor. After all those events