text: Now traveling all the way across the world, from Germany to Columbia. These countries are both spearheading the experiments with pollution reduction and in Bogata -The capital of Columbia, they actually organize "Car free days" seven million people in Bogota alone participated in the event, violaters would even have to pay a $25 fine. According to Andrew Selsky, the author of Car Free Day Is Spinning Into A Big Hit In Bogoto, "[Even] the rain hasn't stopped people from participating." It seems that, rightfully, this event is treated as a celebration and it has great effects on the environment.