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4.AirPollutionAirpollutionisoneofthemajorproblemsofthemodernworld.Agreatdealofenergyisneededtorunthefactoriesofmodernindustrialnations.Automobile,trains,planesandbussesneedenergy,too.Nearlyallofthisenergyisproducedbyburningfuels.Theburningproduceswastes,someofwhichremainintheair,causingairpollution.Scientistsarefindingwaystostopairpollutionespeciallyinbigindustrialareasanddensely-populatedcities.Theyarestudyingnewwaysofgeneratingelectricitythatmaybelessdamagingtotheenvironment.Inthemeantime,manypowerplantsarebeingmodernizedtogiveofflesspollutedmaterial.Also,engineerstrytodesignandlocatenewpowerplantstodominimumdamagetotheenvironment.However,itmaybethatwestillhavealongwaytogobeforewehavea"clean"world.Nearlyallofthecountriesaretryinghardtopreventandcontrolairpollution.Thereindeedseemstobenoendtotasksthatenvironmentalistswillberequiredtodo.Peoplewillcontinuallyfindnewwaystocontrolpollution.TheplaceofScienceandTechnologyinModernLifeHumanlifecannotcontinuewithoutscienceandtechnology.Formanyyears,humansocietyhasdevelopedwiththeadvanceofscienceandtechnologywhilethedevelopmentofscienceandtechnologyhasinturnbroughttheprocesstomankind.Sothelifewearelivingnowismorecivilizedthanthatofourforefathers.Thedevelopmentofscienceandtechnologyhavebroughtaboutmanychangesinpeople'slife.Forexample,theinventionoftelevisionandspacerockethaveopenedaneweraformankind.ThroughtheuseofTVpeoplecanhearthesoundandlearntheeventshappeningthousandsofmilesaway.Owingtotheinventionofspaceshipandrocket,thedreamofman'slandingonthemoonhasnowcometrue.Scienceandtechnologyalsoplayanimportantroleinoursocialistconstruction.Wemaysay,oursocialistconstructionisjustlikeaskyscraper,whilescienceandtechnologyareitsbase.Withoutthebase,theskyscrapercan'tbebuilt.Therefore,weshouldtryourbesttocontributetothedevelopmentofscienceandtechnologysoastoprovideamoresolidbasetobuildourcountry.ImportanceofEducationChina,asadevelopingcountry,isdeterminedtocatchupwithandevensurpassthedevelopedones.Ithinkthatoneofthebestpossiblewaystodosoistogivefirstpriority(优先)tothedevelopmentofculture,scienceandespeciallyeducation.Inmoderntimes,whenscienceandtechnologyaremakinggreatprogress,theeducationoftheworkforceisofprimaryimportance.Moreover,manyofthesuccessinadvancedcountrieshavedemonstratedthatanation'sprosperitymainlydependsonthequalityofitslabourforce,namelythosewhohavebeenwelleducated.InadevelopingcountrysuchasChina,ourinvestmentinculture,educationandscience,andespeciallyelementaryeducation,mustenjoytoppriority.Thisiscrucial(决定性的)forChinatocatchupwiththedevelopednationsintoday'ssurging(汹涌的)wavesoftechnologicalrevolution.Otherwise,thegapbetweenChinaandadvancedcountrieswillbewidenedratherthanbridged.EnvironmentalProtectionTodaythequalityofournaturalenvironmenthasbecomeanimportantissue.Theworldpopulationisrisingsoquicklythattheworldhasbecometoocrowded.Weareusingupournaturalresourcesandatthesametimepollutingourenvironmentwithdangerouschemicals.Ifwecontinuetodothis,lifeonearthcannotsurvive.Concernedpeoplehavemadesomeprogressinenvironmentalprotection.Governmentsofmanycountrieshaveestablishedlawstoprotecttheair,forestsandsearesourcesandtostopenvironmentalpollution.Stillmoremeasuresshouldbetakentosolveenvironmentalproblems.Peopleshouldbefurthereducatedtorecognizetheimportanceoftheproblems,tousemodernmethodsofbirthcontrol,toconserve(保存)ournatu...