water'sworldwidetravelsetc.

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1、Water'sWorldwideTravelsetc.　　Waterrunsdownhillfrommountaintopstostreamstoriverstooceans.Butdownhillisn'ttheonlywaythatwatermoves.Anewstudymeasureshowwatertravelsforhumanconsumption.Thisflowisn'tthetypeweusuallythinkabout.Thesescientistslookedatthewaterusedtogrowandmak

2、etheproductsthatgetshippedfromnationtonationasimportsorexports.Theycallthisaflowof"virtualwater".　　Wetypicallythinkaboutwaterastheliquidthatflowsfromafaucet.However，nearlyall92percentofthewaterusedbypeoplegoesintogrowingcrops，accordingtowaterresearchersattheUniversity

3、ofTwenteintheNetherlands.Theyrecentlystudiedthehiddentravelsofvirtualwaterusedinproductsmadefromthingslikecropsandmeats.Theseproductsareshippedaroundtheworld.　　Forexample，considerasugarysoftdrink.Researchersestimatedthattoproduceonehalf-literofthebeveragerequiresbetwe

4、en170and310litersofwater.Onlyatinyamountofthat-about1percent-isthewateractuallyusedinthesoda.Thevastmajorityofthewater-about95percent-isusedtogrowandprocesstheingredients.Another4percentgoesintothepackagingand3labeling，saythescientists.Inthecalculation，whenonecountryp

5、roducesahalf-literofsodaandsellsitabroad，itexportsasmuchvirtualwateraswouldfillalargerefrigerator.　　Accordingtothisnewreport，drycountrieslikeIsraelandKuwait，bothintheMiddleEast，getthemajorityoftheirvirtualwaterfromothercountries，throughimportedproducts.Moresurprisingl

6、y，somewettercountries，liketheNetherlandsandtheUnitedKingdom，alsogetthemajorityoftheirvirtualwaterfromotherplaces.Thatmeansthatmostofthewaterusedtogroworproducetheproductsandfoodconsumedinthosecountriescamefromothercountries.　　IntheUnitedStates，mostofthevirtualwateruse

7、dcomesfromAmericansources；only20percentofthevirtualwatercomesfromoutsidenationalboundaries.InChina，evenlessofthewaterassociatedwithitsproducts（about10percent）camefromforeigncountries.　　Tracingthewatertrade，researchersturnedupothersurprisingrelationships.Forinstance，of

8、tenanaridregionsendsvirtualwatertoawetterregion.DryareasinnorthernChina，forexample，sendvirtualwatertothesouthernpartofthatco