节约用水演讲稿 PPT

SavingWaterTheworldisnotonlyhungry,butalsothirstyforwater.Thismayseemstrangetoyou,sincenearly75%oftheearth'ssurfaceiscoveredwithwater.Butabout97%ofthishugeamountisseawater,orsaltwater.Mancanonlydrinkandusetheother3%--thefreshwaterthatcomesfromrivers,lakes,underground,andothersources.Andwecannotevenuseallofthat,becausesomeofitisintheformoficebergsandglaciers.Evenworse,someofithasbeenpolluted.However,asthingsstandtoday,thissmallamountoffreshwater,whichisconstantlybeingreplacedbyrainfall,isstillenoughforus.Butourneedforwaterisincreasingrapidly--almostdaybyday.Onlyifwetakestepstodealwiththisproblemnowcanweavoidasevereworldwidewatershortagelateron.Alimitedwatersupplywouldhaveabadeffectonagricultureandindustry.Letmegiveyoujustonesmallexampieofhownecessarywateristoindustry.Didyouknowthattoproduceasingletonofsteel,ittakesabout91,000litersofwater?Weallhavetolearnhowtostopwastingourpreciouswater.Oneofthefirststepsweshouldtakeistodevelopwaysofreusingit.Experimentshavealreadybeendoneinthisfield,butonlyonasmallscale.Forus,thesystemsareasimportantasthespacecraft.WaterisPrecious!Imagineonedayyouareoutofwater!Ourcountry'scity,speciallythebigormedia-sizedcities,thewaterresourcesshortisalsoapoverty-strickenquestionwhichthepeopleface.Ourcountryaverageperpersonwaterresourcespossessiveamountisonlytheworldaveragelevel1/4,butthewaterconsumptionisveryactuallyhuge.LookslikeBeijing'saverageperpersonwaterconsumptionisworldaveragelevel4times.Therefore,donotthinkthateconomizeonwaterandyouirrelevant,waterdrop'smainitemonedaymayleaveout70literswater,oneyearis25tonswater.WaterisMoney!saveonwaterwhenwashesthehands,washeswiththetroughcomparedtousesthehightideclassamethodmoreeconomicalwater,thewashvegetablesfruitorwasheswhenthebowltobealsosame,isopeningthewatercockuninterruptedflushingnon-currentexpensewater,theinterruptedflushingcansavethewater.HasusedShuiCungetsdownmayalsouseoncemore.inthefamilywasher'swaterconsumptionisbig,tosavewater,theManufacturerandthescientificresearchersunderfullytime,must,intheguaranteewashesunderthecleanclothes'premiseeconomizeonwaterasfaraspossible.thethiskindofincline'smodellingisnotforartisticorproposessomethingnewanddifferent,10degreeinclinedesignsareinnateitthetruth.Afterwashingclothesthetubecrooked10degrees,itswaterlevelrelativelydeepened,couldachievethegreatwatervolumethescrubbingeffect.Thereforeitsavesthewater.thewasherestablishestheprocedureisawashgenerally,tworinses,thewatermainlInourslife,suchcrackisnotrare.Besidesacquiresthesavingwaterconsciousness,butalsowhatknow-howhastoletusbeabletosavethewater?solongaswepayattentiontotheintravenousdripminormatteractually,savingwaterisveryeasytoachieve.Likelyoneliminationtablewarewhenoverweightgreasydirtdonotwashdirectlywiththedetergent,usespapercleaningfirst,thencleansagain,likethismaysavemorethan50%watersused.Thankyou!