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- It'sknownas"theroofoftheworld,"fourthousandsevenhundredmetersabovesealevelliestheTibetanPlateau.ItsglaciersarethesourceofmanyofAsia’smostimportantrivers.Buttheiceismelting.Scientistssayifthatcontinuesatcurrentlevels,two-thirdsoftheplateau'sg...
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