text: Between 2001 and 2009, there was about a 23 percent drop in young people getting their license. These numbers are inspiring cities all over the world to make a change and do their part to make a change in the world. The capital of Columbia, Bogata has something known as a "car-free day," where only busses and taxis are permitted to be on the road. Other drivers will face a $25 fine. Even in the rain people continued to not use their car. Two other Columbian cities, Cali and Valledupar, also joined in for the first time this year. Bogota has a population of around seven million people, so even if they stop just a quarter of them from driving, then that could cut down on a lot of carbon-based emissions. In Paris, France, drivers were given 22-euro fines for even numbered license plates on one day, then odd numbered license plates the next. Congestion was down 60 percent, and this was after five days that Paris' emissions could rival those of major cities in China. France's tax policy that makes diesel fuel more viable than gasoline was partially to blame, according to Reuters. Diesel engines make up 67 percent of cars in France, which is much higher than their European counterparts. Compared to other captials, Paris has a much higher particulate matter as well. It had over 30 more micrograms than the next highest, which is Brussels, mostly due to the cold nights and warm days, which would trap carbon. After the smog was cleared, Paris released the ban on certain numbered license plates.