Theworldweliveinisbecomingmoreandmoreintolerablebecauseofenvironmentaldestruction.BirdfluandSarsaretwotypicalexamplesthatenvironmentaldestructionmaythreatenourlife.Besides,forestdestruction,waterandairpollutionresultindecreaseofplantinglandandunpleasantweather.

　　Seriousastheproblemseems,wecancomeupwithsomemeasurestodealwithit.Firstofall,theauthoritiesshouldadoptthepolicyof"sustainabledevelopment",andlawsconcerningenvironmentalprotectionshouldbeputintoeffectandenforcedstrictlyjustasourgovernmenthasbeendoing.

　　What'smore,everycitizenshouldrealizetheseriousnessoftheproblemandmakeconcertedeffortstoprotectourenvironment.Inaddition,plantingtreeshelpsimproveandbeautifytheenvironment.