Todaythequalityofournaturalenvironmenthasbecomeanimportantissue.Theworldpopulationisrisingsoquicklythattheworldhasbecometoocrowded.Weareusingupournaturalresourcesandatthesametimepollutingourenvironmentwithdangerouschemicals.Ifwecontinuetodothis,lifeonearthcannotsurvive. 　　Concernedpeoplehavemadesomeprogressinenvironmentalprotection.Governmentsofmanycountrieshaveestablishedlawstoprotecttheair,forestsandsearesourcesandtostopenvironmentalpollution. 　　Stillmoremeasuresshouldbetakentosolveenvironmentalproblems.Peopleshouldbefurthereducatedtorecognizetheimportanceoftheproblems,tousemodernmethodsofbirthcontrol,toconserve(保存）ournaturalresourcesandrecycle（再循环）ourproducts.Wearesurethatwecanhaveabetterandcleanerplaceinthefuture.