text: Paris, France and Bogota, Columbia have prooved that having less car-owners has decreased pollution levels. In Bogota, there is a Day Without Cars where only public transportation is allowed. Citizens will suffer a $25 fine if they are driving their own car. Paris, France temporarilly banned driving, and if they were found driving a 22-euro fine was charged. Both countries saw immediate results in the ammount of smog in theit cities.