Ukushintshwa kwesimo sezulu kanye nokuthuthukiswa okusheshayo kwemboni yezwe kanye nezolimo kwenze inkinga yokuntuleka kwezinsiza zamanzi amasha amanzi aqhubekayo. Ngokusho kwezibalo zeBhange Lomhlaba, ama-80% amazwe nezifunda emhlabeni anawo amanzi amasha ngokusetshenziswa kwezimboni nezezimboni. Izinsizakusebenza zamanzi ahlanzekile ziya ngokuya zinqabile, ukuze amadolobha athile asogwini nawo athi sína. Ukuntuleka kwamanzi. Inkinga yamanzi ibeke phambili isidingo esingakaze sibe khona ukuze kuncishiswe amanzi olwandle. Izwe lami linamakhilomitha skwele angaphezu kwezigidi eziyi-4,7 ezisolwandle kanye nolwandle olusemngceleni, olwela lwesihlanu emhlabeni, ngemithombo eminingi yamanzi olwandle kanye namathuba amakhulu okuthuthuka.