text: In the article Duffer explains how the most ppopulated cities are the ones with the the smog or air pollution. Cities like Beijing and China have alot of smog in the air is because of the use of cars. The use of cars have a very negative impact on the enviorment. Countries all over the world are taking a step foward towards limting their use on cars due to effcts its has. In an acrticle called In German Suburb, Life Goes on Without Cars writen by Elisabeth Rosenthal talks about an upscaled coummunity in called Vauban Germany where people have given up theirs cars. In Vauban's 70 percent of the families that resided in vaubans don't own cars, and 57 percent sold a car to move into the community. Even though alot of the resdients of Vauband dont use car some still due. Ownig a car is still allowed vauband uses large garages where people can  store thier cars,but a person must first pruchase a parking space for $40,000 first. While some cars are still used in the comuntiy walk or bycicle as thier means of transportation. Vauband is a prime example of of a postive growing trend. Vauband helps to reduce the green house gas emissions cars give off.