Bicycle

　　As our planet is getting warmer and warmer, I think it’s time to use bicycles more often.

　　Bicycle is green. We don’t need to burn petrol and it produces no green-house gases. Besides, as our city becomes more and more crowded, it is better to ride a bicycle because a lot of space will be saved.What’s more, riding a bicycle is good for one’s health. Though people today still use many cars, I believe bicycles will be much more popular in the future.