Myfavoritetransportationinmycityissubway,andhereareacoupleofreasons.

　　Unlikeautomobile,subwaynevercostspetrolorgastorun.Therefore,itdoesnotpollutetheair.Itwillsomehoweasethesevereairpollutionoftheworld.Secondofall,sinceitgoesunderground,itdoesnotcauseanytransportationtrafficontheroad.Inthiscase,itsurelysavesusalotoftime.Thoughthepriceoftakingasubwayisalittlebithigh,itisdefinitelyworthitbecausewewouldhavemoretimeinseadofwastingalotofitoncarsortrafficjam.Forexample,withthetimesaved,wecanhavemoretimeforbreakfastandevenfeelfresherafterarrivingattheoffices.Whatismore,sincethereisnotrafficjam,therewillbefewerpeopledyingfromthecarcrash.Therewillbefewertragedies.

　　Allinall,amongallmeansoftransportation,Ilikethesubwaythebest.