I could not agree more. This article is saying it all. Bicycle is very useful for both saving the environment and creating a healthy lifestyle. There is no carbon dioxide or other pollutant gases emission, when we use bicycle as a means of transportation. It is also very important was of exercise. How many of us us exercise in everyday life? However, people who bike exercise in more enjoyable way. We can encourage people to bike and we appreciate people who bike, when we have a bicycle day. Therefore, I strongly suggest the idea of having world bicycle day!!