text: Thirdly, a lot of citys are starting to have car free days, this is shown in source 3, by Andrew Selsky.  In cities like Bogota, Cali, and Valledupar, all in Columbia, they have "Day without cars" this is one example of cars becoming less popular because, even though it was raining, tons of people still participated.  Another example is in source 4, by Elisabeth Rosenthal, she says that her children, both of age to get a license and living where one might want a license, still have not gotten there license because they do not think it is nessasary, and they simply stay where they can walk, or ride bikes, or take the bus, or the subway.  Mr. Sivak has shown that the number of 16 to 39 year olds that have a license has significantly reduced.