text: A third way cars could be used less is if you have no car days like Bogata, Colombia has. In article three Carlos Arturo Plaza says "It's a good way to take away stress and lower air polution." He is saying that cars a cause for polution and doing this day is a good way of lowering polution rates. This source also stated that other cities in Columbia like Cali and Valledpar are joining in this event. It is also said that other country leaders go to Colombia to watch this event. Afterwards they say the event is awesome. This means that not only is the event spreading across Colombia, but it could possibly spread to other countries as well. Without  a doubt this is another effective way to limit the use of cars.