text: Cars of today and back run on gasoline which we get from fossil fuels that we get from the ground. This resource wont last forever and will eventually disapear if we keep using it. The stuff created from cars exhaust pipes damages are air supply and are environment. it creates smog in the air which is bad for the lungs to inhale. Like the people in Vauban, Germany who dont even drive cars, im sure there air is clean or atleast alot cleanier than ours is.