Amanzi enza i-60% yomzimba womntu. Nangona kunjalo, ukusilela ukusela amanzi aneleyo kunokubangela ukuphelelwa ngamanzi emzimbeni kunye neempawu ezibi, kubandakanya ukudinwa, intloko ebuhlungu, ukomelela komzimba okomileyo, kunye nolusu olomileyo.

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