There is no doubt that using bicycles could prevent obesity because it is a cardio exercise. This advantage frequently becomes the main argument for forcing society to travel by bicycle. Nevertheless, keeping in shape should not be the fundamental reason for restrictions on the usage of cars. Nowadays, more people become concerned about the ecological situation in the whole world. Automobiles have a negative impact on it, causing protests throughout the world because people want their governments to compel citizens to use bikes for short trips. Meanwhile, I do not believe in its efficiency and I will expound my point of view.