Asweallknow,theearthisaplanetalmostcoveredbywater,anditiswatermadeeverythingontheearthlively．Waterisalsooneoftheimportantpartofourenvironment．Though,istherereallysomuchwaterforustoclean,toproducemanythings,toplaywith?howmuchwaterarethereontheearththen?
Mostofthewaterisintheoceansorlockedawayasice．Thelargestvolumesoffreshwaterarestoredundergroundasgroundwater,imaginethereisonlyonebarrelofwaterintheworld,thenthereisonlyaspoonofitontheland,andthewaterwecanuseisonlyadropofit．NowIhavetoremindallofyouherethatthesingledropofwaterisneverasCleanasbefore,ithasbeenpollutedseverelybyourhumanbeings．
ThereisaverybeautifulriverinParis．ItistheSeine,itrunsacrosstheCity,peopledrinkcoffee,chatonthebankintheday,atnight,theyenjoythebeautifulsceneryintheboat,songsfromtheriverflyintotheSkymadetherivermoreattractive,theSeineisafamoussymbolofFrance；onthewestcoastofpacificoceanthereliesthemodernCityShanghai,anotherriverwhichusedtobeaveryimportanttransportationrouterunsthroughthecenterofthecity,peoplerespectedandregarditas"mother"．Itisthe"suzhouriver,butlbelievethatfewofyouwouldsitbesideit,peoplewillbescatteredbytheterriblesmellofwaterwhenwalkby．Ihavetosayitisextremelydirty!AndweallknowthatalotofbeautifulriversintheworldalsoareSharingthesamefatewithsuzhouriver．Whoisthedevil?Ican'thelpasking．
Manyhumanactivitiesandtheirby-productshavethepotentialtopollutewater.Pleasehavealookalongthebanksoftheriver,largeandsmallindustrialenterprisesdischargedirty
water,tonsofgarbagewerethrownintotheriver,thewatercontainedsomuchthatitcan'tcleanitself.ComparedwiththedramaticdevelopmentinmanysidesofShanghai,thesuzhouriverhasbecomeablackpointoftheappearanceofcity.
Fortunately,thegovernmenthascontrolthesituationnow,wearehappytoseesomepartsoftheriverhasbecomecleanagain,andweevencanfindfishsometime.
Theuniqueearthistheonlyplanetfulloflives,thewaterisjustlikethebloodintheactivebody,protectingwaterissavingourselves.Nottowasteasingledropofwater,otherwise,theonly
