text: One influential example is Bogota, Columbia. The citizens of Bogota have a tradition called "the Day Without Cars." They have been honoring this tradition for three years straight, and other countries around them are starting to take notice of its effects. Source 3 states, "For the first time, two other Columbian cities, Cali and Valledupar, joined the event." This statement shows how much of a pressing matter smog is to normal ppeople around the world. Source 3 also states, "It's a good opportunity to take away stress and lower air pollution." A day without cars not only helps the enviroment, it also mentally helps a person. If this could lower stress world wide, then less people would suffer from stress related injuries. Source 3 states, "... and new restaurantsd and upscale shopping districts have croped up." This tradition also helps the economy and can lower the percentage of people under the poverty line by creating jobs and helping people start their own business.