text: To begin with, In Vauban, Germany most families don't own cars but 57 are sold when new families and other people move there. Cars or automobiles as the german like to call it are linchpin of suburbs which mean they're affordable. Most middle class families tend to stay around the Shanghai area. Studies show that 12 percent of gas emissons are because of passenger cars. Also up to 50 percent are cars in intensive area.