这里来了,纯手打原创,求精求分!鄙视拿了答案不给分 　　Yousee,carseverywhereinChina,isthatwhatwereallywant?Dustperfumetheair,whydon'tweusebikesinsteadofcars?Theyhavethreegreatadvantagescomparetocars.Firstly,bikesnonotusefueltoproduceenergyforthevehiclelikecarsdo,theyuseyourfeet,thegreatenviremontallybenifiteisunavoidableinmentioning.Secondly,youcanexcericewhilebikingratherthensittiinginacarandgettingfat.NowdaysobeseisaveryimportantproblemespeciallyinUnitedStatesofAmerica.Finally,bikeshavewayloweropreatingcoststhecarsdo,allyouneedforbikesisabikeandyou.Lookingatcarsontheotherhand,cleaning,fualcost,andenvirementalwastesetc.Thesefactorssuchasenvirementalproblems,obesity,andmoneycostsareallbadfortheenvirement,soweshoulddoourbesttohelpit,it'sadutyforallmankindonearth!