随着人口的增长和家庭轿车的普及，交通安全问题已成为千家万户关注的焦点。作为初中生你是怎样上学的呢？是乘公交车、小汽车还是自行车？请根据提示词发挥想象以the advantage of the bicycle为题写一篇60-80词短文，开头已给出
提示词：save energy, cause air pollution, park bikes, cost little, a useful sport, be good for health
The bicycle is one of the most important vehicles in the world. In every country people use bicycles for work, for sport or just for fun. As a student, we like going to school by bike. Why is it so popular? ____________________________________________________________________
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