text: More efforts like Vauban are being made in large cities like Paris, France and Bogota, Columbia. According to source 2, Paris recently enforced a law to reduce emmisions, where even number plated cars may drive on Monday, and odd number plated cars my drive on Tuesday, and so on. The laws soon proved ineffective after a short time, for Paris to recind them. Paris, being one of the most polluted European cities, will certainly be making more efforts against pollution. An improvement campaign in Bogota, Columbia calls for one whole day without cars, according to source 3. Citizens are urged to take other means of transportation, like bikes or busses. Violators faced a $25 fine. The dark gray rainclouds didn't stop the citizens of Bogota from taking away stress and air pollution. This year, for the first time, two other cities, Cali and Valledupar, joined Bogota in the event. Cities around the world like Paris and Bogota are making efforts to reduce air pollution and leading better lives in cleaner cities.