海洋污染 英文演讲稿.ppt

海洋污染 英文演讲稿.ppt

ID:48411820

大小:2.26 MB

页数:14页

时间:2020-01-19

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1、marinepolutioninChinateammembersTheloseoflivingenvironment1.enclosingtideland,Marine、coastalprojectandwaterwaydredgingactivitiesarethecauses.thus,thenormalactivityofMarinelifeisSeriouslyinterfered,sometimesevenmakeMarinebiologicalhabitatcompletelyextincted.Andthedec

2、lineinthenumberofmangroveisthebestexample.overfishingandilleagallytrade2.becausealotofMarineanimalhasveryhighornamentalvalueorcanbetreatedasartcollection,andwithnutritionalvalue,peoplearedrivenbyintereststofishandevenillegallycatch.What'smore,Marinefishingvesselsinc

3、reaseddramatically,fishingsegmenthasimprovedsteadily.thesecauseseriousdestructionoftheresourcesandevenmakethemdieout.alienspeciesinvasion3.withthedevelopmentofChina'soceantransportation,Thespreadofbreeding,andsoliciting,foreignMarinespecies'quantityincreasedsharplyr

4、esultingintheMarineecologicalsystemstructure'simbalance,functiondegradationlossofdiversity,whichmakesChineseoceanenvironmentfacesincreasingpressureofintrusion.Marineenvironmentpollution4.Oceanoilleak,Marinetransportation,variousland-sourcedpollutants(mainlycoastalin

5、dustrialwastewaterandlifesewage)dischargedintothesea,aggravatingtheMarineenvironmentpollution,andtheMarineecologicalenvironmenthasdeteriorated.ThefivewastewaterdischargedintotheoceanFirst,thelow-levelradioactivewastewaterTheso-calledlow-levelradioactivewastewaterisa

6、litercontainedradioactivitylessthan10(-5)CuriewastewaterThesecond,containingtheeasilydegradableorganiccompoundsandheavymetalsinwastewaterEasilydegradableorganicmatter,microorganismsundernaturalconditionsisdifficultdescendingdecompositionoforganicmaterialoccursinthen

7、aturalenvironmentcanbemaintainedindefinitelyanddisseminated,andthusaseriousimpactonthemarineenvironmentandecologicalThird,medicalsewagecarryingpathogens,domesticsewageandindustrialwastewaterPathogens,infectiousagents,includingpathogens,diseaseeggs,viruses.Pathogensc

8、ansurviveinthewatercanenterthebodythroughthefoodchain,whichmakeyousickfourth,Industrialwastewatercontainingorganicmatterandnutrients,sewag

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