Riding a bicycle can help save the environment.first, a bicycle does not use gasoline and as a result, it does not emit exhaust gas go the atmosphere. unlike other vehicles that produce dirty air, a bicycle is pollution-free, easy to use and environmentally friendly. in addition,............... a bicycle is small and does not need lots of space to ride. the rider can exercise as well as enjoying the scenery on the way. thus,it is convenient and economical to use.