Whenwegoout,wecanseemoreandmorecarsonthestreet.Evenallofusknowthatpaivatecarisbecomingaveryimportantsourceofairpollution,peoplejustcan'tstopusingprivatecars.Tobefrankly,carsbringusconvinienceandspeedwhichbecomesmoreimportantinourdevelopingsociety.Butinthelongrun,weshouldstopthebroaduseofprivatecars.

Buthowtoreducetheuseofprivatecars?Ithinkitiseasyforustodothis.First,sinceourgovernenthasdevelopedthepublictransportation,weshouldtakeadvantageofthis.Withthehelpofbus,subwayandsoon,wecangotoeverywhereateverytimeeasily.Second,trytowalkmoreandgooutwithbicycle,whichisfasttoobutgoodforourenvironment.Nowpeopleallovertheworldaremoreawaredofenvoronment,wemusttaketheeffectintoourconsideration.Third,Makeefforttobuyontheinternetnotdrivelongtothesupermarket.Logisticscompanywillsendthingsononeway,soitismoreeconomicthanthecommonway.

Actually,therearemanywaystoreducetheuseofprivatecars.Butthemostimportantis,everyoneshouletaketheresponsibilitytoprotectourworld.