amoAAAmarine+pollution海洋污染+英文版

marine pollution海洋污染 英文版This essay concentrates on five major causes of marine pollution, which are

marinepollution海洋污染英文版 Thisessayconcentratesonfivemajorcausesofmarinepollution, whicharethedischargeofdomesticandindustrialwastewater,waste oil,plastics,heavymetalsandaquaculture.Theproposedsolutionto thisproblemwillbepreventionandpollutiontreatment,andeventually, theformeroneprovestobemoreeffective.Firstly,thisessaywill presentandexplainthemajorcausesandeffectsofmarinepollution. Then,differentsolutionswillbesuggestedinthesecondpart.The finalpartwillevaluatetheeffectivenessofthesesolutionsandshow thatpreventionmaybemoresuccessful. Thefirstmaincauseofthemarinepollutionisthedischargeof domesticandindustrialwastewater.Sinceboththecitiesandindustrial estatesarecrowdedwithlotsofpeople,thereismoresewageflowing intoriversandthenintooceans.Therefore,thequalityofseawater getsworseandoxygencontentdecreasesrapidly.Without oxygen,fishlivingundertheseacannotsurvive.Becauseofthe nutrientsinthesewage,seaweedmaygrowwellfirstlyandeventually diewhenrunningoutoffood.Sothewastewaterwillfinallydestroy ecologicalbalanceforthereasonofthe dischargeofdomesticandindustrialwastewater. Thenwasteoilisanothersignificantcauseofmarinepollution. Afterleakingfromships,orspillinginaccidents,orflowingoutof factories,wasteoilentersoceans.Thetotalamountofwasteoilis