Fromthepictureabove,wecanseethatpeoplearecoughinginthepollutedair.Withairpollutionworseningthanbefore,pm2.5hasbecomeausualwordforus.Needlesstosay,peopledonotlikethisword,asthecontentthewordrepresentsdoesgreatharmtopeople'shealth.
Asthepollutedairdoesaffectourhealth,weshouldtakesomemeasurestomaketheaircleaner.Ontheonehand,weshouldtakemasstransitinsteadofdrivingacar.Accordingtoarecentstudy,vehicleexhaustisamainsourceofairpollution,soifvehicleexhaustreduces,theairwillbecomecleaner.Ontheother,moretreesshouldbeplantedtoabsorbthetinydustintheair,whichsurelywillmaketheaircleaner.