I surely agree this article. I did not know that the bicycle was made about 200 years ago. Also, the amount is getting closer to 5 billion in 2050. When i was little, bicycle was my first transportation i used after i born. I also have lots of memories about bicycle and i enjoyed riding it. I was happy when i started to ride two wheel bike, and i was sad when i failed riding bike. Most memories are good and i love bicycle. I enjoyed riding a bike before i came to the college. I miss that time. We have to make world bicycle day and let people know the happiness of riding a bike! I am sure that people will love it!