![Thelackofcleandrinkingwaterisamajorproblemworldwide.The...]( "Thelackofcleandrinkingwaterisamajorproblemworldwide.The...")
- 問題詳情：Thelackofcleandrinkingwaterisamajorproblemworldwide.TheWorldHealthOrganizationsaysmorethanonebillionpeopleliveinareaswhererenewable（可再生的）waterresourcesarenotavailable.TheproblemisespeciallyseriousinAsiaandthePacific.AUnitedNationsreportsays...
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