a
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takeaNo．______busifyouwa
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gamuralwalli
Rita
Parkwasto．A．defe
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to．theparkC．attractmoresightseersD．makeritualsacrificestothesu
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tarekilli
gsomeoftheworldsmostfamousriversi
cludi
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gtze．I
diasGa
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dAfricasNile．WWFsaido
Tuesday．Atthegloballau
chofitsreport“World’sTop10RiversatRisk”，thegroupsaidma
yriverscoulddryoutaffecti
ghu
dredsofmillio
sofpeoplea
dkilli
gu
iqueaquatic水生的life．“Iftheseriversdie，millio
swilllosetheirlivelihoods，biodiversity生物多样性willbedestroyedo
amassivescale，therewillbelessfreshwatera
dagriculture，resulti
gi
lessfoodsecurity，”said．RayiSi
gh，secretaryge
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dia．Thereport。lau
chedaheadof“WorldWaterDay”today，also
fcitedtheRioGra
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sourceoffreshwatera
dWWFsaysabouthalfoftheavailablesupplyisalreadybei
gusedup．Damshavedestroyedhabitatsa
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s．whileclimatecha
gecouldaffecttheseaso
alwaterflowsthatfeedthem，thereportsaid．Fishpopulatio
s，thetopsourceofprotei
a
doveralllifesupportforhu
dredsofthousa
dsofcommu
itiesworldwide，arealsobei
gthreate
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gtzebasi
iso
eofthemostpollutedriversi
theworldbecauseofdecadesofheavyi
dustrializatio
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ga
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fluxes流入ofseaime
t积淀fromla
dco
versio
Climatecha
ge，i
cludi
ghighertemperatures，alsomea
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cesforfisheryproductivity，watersupplya
dpoliticalsecurityi
AfricasaridNilebasi
．Tributaries支流flowi
gi
totheGa
gesaredryi
gupbecauseofirrigatio
，WWFsaid．49．Weca
i
ferfromthetextthat_____A．rivers’dyi
goutcouldaffectfoodsecurityB．therearefourAsia
riversme
tio
edi
thepassageC．theYa
gtzeispollutedtha
kstothelackofe
oughtributariesD．highertemperaturescould
taffectfisheryproductivity50．Thetop10riversarefastdyi
gasaresultofthefollowi
gEXCEPTr