text: One big problem many scientist are beginning to find out about our world is that our ozone layer is being desroyed by polution we put in the air. A big contributer to polution is the exhaust being produced by the million of cars used everyday. Another big problem countrys all over the world have to worry about is smog,or a thick layer of fog that is really hard to see through. having this very dangerous factor in the road many car crash ratings have sky rocketed. One way this can be stop is to do what these few country have been doing, that is to have days through out the year where people cant use their cars at all. To help in force this day police have been giving people fines roughly around thirty dollars. In Bogota,Colombia it was the third straight year cars have been banned. after all these years of banning cars the turnout was large. despite gray clouds that poured rain all over Bogota. When the smog went away from Bogota many other cities from Colombia have joined the event of banning cars. a qoute from