人类和环境ManandHisEnvironment(大学英语作文)

1、人类和环境ManandHisEnvironment大学英语作文Throughouthistorymanhaschangedhisphysicalenvironmentinordertoimprovehiswayoflife.Withthetoolsoftechnologyhehasalteredmanyphysicalfeaturesoftheearth.纵观历史，改善自己的生活方式，人类已经改变了自然环境。人类借助技术工具改变了地球上的许多自然特征。Hehastransformedwoodlandsandprairiesintofarmsandmadelakesandreserviorsou

2、tofriversforirrigationpurposesorhydroelectricpower.Manhasalsomodifiedthefaceoftheearthbydrainingmarshesandcuttingthroughmountainstobuildroadsandrailways.However,man'schangestothephysicalenvironmenthavenotalwayshadbeneficialresults.Today,pollutionoftheairandwaterisanincreasingdangertothehealthoft

3、heplanet.Eachdaythousandsoftonsofgasescomeoutoftheexhaustsofmotorvehicles.Smokefromfactoriespollutestheairofindustrializedareasandthesurroundingareasofthecountryside.Thepollutionofwaterisequallyharmful.Thewholeecologicalbalaneeoftheseaisbeingchangedandindustrialwasteshavealreadymademanyriverslifeles

4、s.Nowenvironmentalprotectionismorepressingthaneverbefore.Asweknow,massivedestructionofenvironmenthasbroughtaboutnegativeeffectsandevenposesagreatthreattoman'sexistenee.人类将林地和草原改造成农田，河流湖泊和水库里面的水用于灌溉和水力发电。人类还通过排干沼泽和开山修建公路和铁路来改变地球的面貌。但是人类对自然环境的改变并不总是带来有益的结果。今天，空气污染和水污染越来越威胁到地球的健康。每天，成千上万吨废气从车辆的排气管排

5、出。工厂释放的烟雾污染了工业区的空气和周围乡村。水污染也是同样的有害。整个海洋生态平衡正在改变，工业废水已使许多河流死气沉沉。现在，环境保护比以往任何时候都更紧迫。我们都知道，环境的巨大破坏已带来负面影响，甚至对人类生存带来巨大的威胁。Indiffereneetotheseproblemswillmeancommittingsuicide.Therefore,effectivemeasuresshouldbetakenandlawspassedtoconserveenvironment.Otherwise,maniscertaintosufferfromtheseriousconsequencescausedbythislackofcareforhislivingsurro