英语演讲稿水污染英文课件

waterenvironmentwaterenvironment1WateristhesourceofallthingsIt’stheonlywater,butit’stheliquidwonderthatmakesourworldpossible.Waterisabletodissolvemoresubstancesthananyotherliquid.It’stakesalotofwatertokeeplifegoing.Wateristhesourceofallthi2123Somedata

wateruse&pollution

whatcanwedo123Somedatawateruse&pollut3

71%ofearth’ssurface

iscoveredwith

water

Arethewatersources

abundant?71%ofearth’ssurface

4

lessthan3%OftotalwaterLowlayer0.3%offreshwater

lessthan3%Lowlayer0.3%5Chinawaterresourcerankfourthintheworld.Chinaisn'trichinwaterresources.Obviously,theprospectofChinesewaterresourcesisn'toptimistic.WaterIssuesinChinawithwaterresourcespercapitabeing2200m3orso,only1/4ofthatoftheworld.

waterresourcespercapitaChinawaterresourcerankfour6South:

population53%

waterresource:78%North:population:47%waterresource:22%Unevendistributionofwaterresources

South:

population53%

wate7WaterisconsideredpollutedifasubstanceorconditionispresentthatrendersthewateruselessforaparticularpurposeThesourcesofwaterpollutionDirectsourceseffluentoutfallsfromfactories,refineries(精炼厂）,wastetreatmentplants...Indirectsourcescontaminantsthatenterthewatersupplyfromsoils/groundwatersystemsandfromtheatmosphereviarainwater...Waterisconsideredpollutedi8AgriculturalWaterUseFourcommonirrigationmethods:Surface/FloodRequiresextensivecanalsystemsSprayUsepumpsTrickleStrategicallyplacesopeningsSub-irrigationPipescanbeusedfordrainageaswellAgriculturalWaterUseFourcom9Excessivefertilizerusemayleadtoeutrophication（水体富营养化）

inmanyaquatichabitats.Agriculturalrunofffromlarge,openexpansesismajorsourceofwaterpollution.AgriculturalWaterPollutionExcessivefertilizerusemayl10IndustrialWaterUseAccountsfornearly50%ofallwaterwithdrawalinU.S.,and23%worldwide.90%ofwaterusedbyindustryisforcooling,andisreturnedtothesource.Verylittleactuallyconsumed.Mostprocessesinvolveheatexchange.Waterusedtodissipateandtransportwaste.ToxicandoverloadwastesleadStreamandlakedegradation.IndustrialWaterUseAccountsf11IndustrialWaterPollutionAllkindsofindustrygeneratetradewaste(工业废水）IronandsteelindustryFoodindustryComplexorganicchemicalsindustryNuclearindustryPollutants:organics,oil,metal,acidMayrequirespecialwastewater

treatment.

IndustrialWaterPollution12DomesticWaterUse70%usedassolventtocarrywastes.30%usedforlawnandgarden.Verysmallfractionusedfordrinking.Naturalpurificationprocessescannotcopewithhighlyconcentratedurbanwastes.Mustbetreatedbeforerelease.DomesticWaterUse70%usedas13DomesticwaterpollutionWastewaterfromBathing,dishes,toiletsNotoxicsubstance,abundantinnutrientswithnitrogen(N，氮）andphosphorus(P，磷）Eutrophication（水体富营养化）Trashorgarbage(e.g.paper,plastic,orfoodwaste)discardedbypeopleontheground,alongwithaccidentalorintentionaldumpingofrubbish,thatarewashedbyrainfallintostormdrainsandeventuallydischargedintosurfacewaters.Domesticwaterpollution14Forgovernments1.Toestablishurbansewagetreatmentsystem(城市污水处理系统)2.TorestructureIndustrial3.Toencouragethedevelopmentofnewwatersources4.Tostrengthenlegislation,severepunishmentForgovernments1.Toestablish15Forplants1.Toreducewaterconsumption2.Tobuyequipmentofsewagetreatment3.Don‘tdischargesewageintowater4.TousewaterrecyclingsystemForplants1.Toreducewaterco16Forindividuals1.Don’tusecleanerconcludeP2.Don’tthrowthegarbageintotherivers3.Topromoteawarenessofpreservingwaterresources4.TotellthepersonsaroundyoutoprotectthewaterresourcesForindividuals1.Don’tusecl17WorldWaterDay

(WorldDayforWater)

OnMarch22theUnitedNationsGeneralAssembly（联合国大会）in1993

aim:toarousepublic’sawarenessofeconomizingwatersources,andtoprotectitonethemeperyear2011:waterforcitiesWorldWaterDay

18Thankyou!Thankyou!19waterenvironmentwaterenvironment20WateristhesourceofallthingsIt’stheonlywater,butit’stheliquidwonderthatmakesourworldpossible.Waterisabletodissolvemoresubstancesthananyotherliquid.It’stakesalotofwatertokeeplifegoing.Wateristhesourceofallthi21123Somedata

wateruse&pollution

whatcanwedo123Somedatawateruse&pollut22

71%ofearth’ssurface

iscoveredwith

water

Arethewatersources

abundant?71%ofearth’ssurface

23

lessthan3%OftotalwaterLowlayer0.3%offreshwater

lessthan3%Lowlayer0.3%24Chinawaterresourcerankfourthintheworld.Chinaisn'trichinwaterresources.Obviously,theprospectofChinesewaterresourcesisn'toptimistic.WaterIssuesinChinawithwaterresourcespercapitabeing2200m3orso,only1/4ofthatoftheworld.

waterresourcespercapitaChinawaterresourcerankfour25South:

population53%

waterresource:78%North:population:47%waterresource:22%Unevendistributionofwaterresources

South:

population53%

wate26WaterisconsideredpollutedifasubstanceorconditionispresentthatrendersthewateruselessforaparticularpurposeThesourcesofwaterpollutionDirectsourceseffluentoutfallsfromfactories,refineries(精炼厂）,wastetreatmentplants...Indirectsourcescontaminantsthatenterthewatersupplyfromsoils/groundwatersystemsandfromtheatmosphereviarainwater...Waterisconsideredpollutedi27AgriculturalWaterUseFourcommonirrigationmethods:Surface/FloodRequiresextensivecanalsystemsSprayUsepumpsTrickleStrategicallyplacesopeningsSub-irrigationPipescanbeusedfordrainageaswellAgriculturalWaterUseFourcom28Excessivefertilizerusemayleadtoeutrophication（水体富营养化）

inmanyaquatichabitats.Agriculturalrunofffromlarge,openexpansesismajorsourceofwaterpollution.AgriculturalWaterPollutionExcessivefertilizerusemayl29IndustrialWaterUseAccountsfornearly50%ofallwaterwithdrawalinU.S.,and23%worldwide.90%ofwaterusedbyindustryisforcooling,andisreturnedtothesource.Verylittleactuallyconsumed.Mostprocessesinvolveheatexchange.Waterusedtodissipateandtransportwaste.ToxicandoverloadwastesleadStreamandlakedegradation.IndustrialWaterUseAccountsf30IndustrialWaterPollutionAllkindsofindustrygeneratetradewaste(工业废水）IronandsteelindustryFoodindustryComplexorganicchemicalsindustryNuclearindustryPollutants:organics,oil,metal,acidMayrequirespecialwastewater

treatment.

IndustrialWaterPollution31DomesticWaterUse70%usedassolventtocarrywastes.30%usedforlawnandgarden.Verysmallfractionusedfordrinking.Naturalpurificationprocessescannotcopewithhighlyconcentratedurbanwastes.Mustbetreatedbeforerelease.DomesticWaterUse70%usedas32DomesticwaterpollutionWastewaterfromBathing,dishes,toiletsNotoxicsubstance,abundantinnutrientswithnitrogen(N，氮）andphosphorus(P，磷）Eutrophication（水体富营养化）Trashorgarbage(e.g.paper,plastic,orfoodwaste)discardedbypeopleontheground,alongwithaccidentalorintentionaldumpingofrubbish,thatarewashedbyrainfallintostormdrainsandeventuallydischargedintosurfacewaters.Domesticwaterpollution33Forgovernments1.Toestablishurbansewagetreatmentsystem(城市污水处理系统)2.TorestructureI