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1、UnitTwoTEXTIBewaretheDirtySeas（当心肮脏的海洋）I.Pre-readingQuestions1.SuggestedAnswer(SA):Itremindsmeofatextaboutthepollutedseaandgetsinterestedinthetextandoccurgreatconcernsonmetoourlivingenvironment.Everyyearthereisalotofsewagepouredintotheseas.Thewasteofcoastalcities,industryandfactories’p
2、oisons,etc,causetheseastobecomedirtyandcausemanydiseaseswhichthreatenpeople’slives.Meanwhile,theI.Pre-readingQuestionsseasareimportanttourplaces,andthecommonareasofthecountriesalongthem.Theyplayveryimportantrolestothecountriesandpeopleintheareas,ifnottreatedproperly,theywillbringgreatt
3、roubletohumanbeings.III.LibraryWork1.Waterpollutionisamajorelementof20th-centuryenvironmentalpollution.Itincludestheaccumulationinoceans,lakes,rivers,andstreamsofphysical,chemical,andbiologicalsubstancesthatareeitherdirectlyharmfultolifeorthathavedangerousorharmfulsecondaryandlong-rang
4、eeffects.Theprincipalsourcesofwaterpollutionaresewage,industrialwaste,garbageandrefuse,andagriculturalfertilizers,pesticides,andweedkillers.Thetwochiefreasonsforthecontami-III.LibraryWorknationandexacerbationoftheproblemareindustrializationandurbanization.Industrialwastesincludedissolv
5、edminerals,toxicchemicals,andsediments.Modernindustrialprocesseshavepollutedwaterwithcertainmetals,suchasleadandmercury,whileagriculturalpracticesdosowithavarietyofpesticides.III.LibraryWork2.Treatmentandcontrolofwastesofallkindsistheonlyanswertowaterpollutionproblems.Pollutioncanbecon
6、trolledbybuildingsewersystems,sewagetreatmentplants,andinstallationstokeepfertilizersandinsecticidesfromenteringthewater.IV.OrganizationoftheText1.Paragraphs1-4Introducingthetopic:TheMediterraneanisthemostpollutedseaintheworld(thesisstatement).(1)Causesandconsequencesofthepollutioninge
7、neral.(2–4)IV.OrganizationoftheText2.Paragraphs5–10Firstmaincause---sewageImpropertreatmentofsewagebymanyMediterraneancountries.(5–7)Consequences:contaminationofseawaterandfish;greaterlikelihoodofdisease(8–10)IV.OrganizationoftheText3.Paragraphs11–13Secondmaincause---industriesUntrea
