we can become healthier by riding bicycles. Since people are busy with works, they have almost no time to do exercise. But if they ride bike to work, then they can practice themselves quite often. Consequently, they will be healthier.
bicycle is good for our environment. In almost all big cities, the average temperature is a bit higher than countryside because there are too much pollution there. We all know that people in big cities like to drive cars to go to work rather than taking public transportations. So, our environment is polluted by lots of gas. If more people join in the trend to ride bicycles to work, then our air quality will be improved obviously.