text: ".  This city of 7 million people started a program that chooses one day a year to bann all car usage with the exception of buses and taxis, fining violators with $25. One main benefit has come out of this: People are more active phisically and therefore have less stress.  Selsky's essay can be quoted saying, "- millions of Colombians hiked, biked, skated, or took buses to work during a car-free day yesterday,". The benefits of more physical movement are obvious, but one is not so obvious: It lowers stress.  A businessman by the name of Carlos Arturo Plaza said, "It is a good opportunity to take away stress and lower air pollution". If a simple day can cause such drastic changes in the enviroment, peoples health, and lower stress, why not go ahead and do it?