Cars,anecessarytransportationtool,arebecomingmoreandmoresignificantinourmodernsociety. 　　Usingacarisfasterthantakingabusespeciallywhentimeislimited.Itdoesnothavetostopasfrequentlyasabus,andatthesametime,itismucheasiertokeeptoatightschedule.AsfarasIamconcerned,carshaveagreaterbeneficialeffectonthesociety.Acarwillcertainlygetyouwhereyouaregoingfaster,andindoingsoitwillreducethepressureonyouandyourworkschedule.Forexample,amanwouldspendonehouronthewaytoworkbycar,whereasitwillreducethepressureonyouandyourworkschedule.Forexample,amanwouldspendonehouronthewaytoworkbycar,whereasitwilltakemorethan2hoursifhechoosestotakebus.Calculate,justhowmanyassignmentscouldbefinishedduringthatonehour? 　　Ontheotherhand,wecannotignoretheproblemswhichareinducedbydrivingacar,suchasenergycrisis,trafficproblems,eventheenvironmentalpollutions.Withtheincreasingnumbersofcars,bigcitiesarefacedwithaseriousproblem,trafficjams.Nodoubtcarsconsumealargequantityofenergy,gasolineandelectricity,bothofwhichcauseairandwaterpollution.Ifwecontinuewastingtheseenergies,itishardtoimaginelifeintwentyyearstime.Increasinganimalextinction,foodshortages,andhealthworsethanbefore.Howcouldweliveinsuchasociety?