text: Secondly, not only do cars cause a great deal of life threatening polution, but some people living without their cars found their life to be less stressful. Owning a car is not only expensive due to maintainance but because of these fluctuating gas prices! If you were to sell your car now and either walk, bike, or ride the city bus to work or school you would save thousands. While keeping city busses would still cause some pollution it's not as great the amount of pollution as millions of cars. Also, walking would help keep the world in shape since it is a great way of exersize.