1、人類和環(huán)境ManandHisEnvironment大學英語作文Throughouthistorymanhaschangedhisphysicalenvironmentinordertoimprovehiswayoflife.Withthetoolsoftechnologyhehasalteredmanyphysicalfeaturesoftheearth.縱觀歷史，改善自己的生活方式，人類已經改變了自然環(huán)境。人類借助技術工具改變了地球上的許多自然特征。Hehastransformedwoodlandsandprairiesintofarmsandmadelakesandreserviorsou

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

3、heplanet.Eachdaythousandsoftonsofgasescomeoutoftheexhaustsofmotorvehicles.Smokefromfactoriespollutestheairofindustrializedareasandthesurroundingareasofthecountryside.Thepollutionofwaterisequallyharmful.Thewholeecologicalbalaneeoftheseaisbeingchangedandindustrialwasteshavealreadymademanyriverslifeles

4、s.Nowenvironmentalprotectionismorepressingthaneverbefore.Asweknow,massivedestructionofenvironmenthasbroughtaboutnegativeeffectsandevenposesagreatthreattoman'sexistenee.人類將林地和草原改造成農田，河流湖泊和水庫里面的水用于灌溉和水力發(fā)電。人類還通過排干沼澤和開山修建公路和鐵路來改變地球的面貌。但是人類對自然環(huán)境的改變并不總是帶來有益的結果。今天，空氣污染和水污染越來越威脅到地球的健康。每天，成千上萬噸廢氣從車輛的排氣管排

5、出。工廠釋放的煙霧污染了工業(yè)區(qū)的空氣和周圍鄉(xiāng)村。水污染也是同樣的有害。整個海洋生態(tài)平衡正在改變，工業(yè)廢水已使許多河流死氣沉沉?，F在，環(huán)境保護比以往任何時候都更緊迫。我們都知道，環(huán)境的巨大破壞已帶來負面影響，甚至對人類生存帶來巨大的威脅。Indiffereneetotheseproblemswillmeancommittingsuicide.Therefore,effectivemeasuresshouldbetakenandlawspassedtoconserveenvironment.Otherwise,maniscertaintosufferfromtheseriousconsequencescausedbythislackofcareforhislivingsurro