Amanzi amdaka aveliswa kwimisebenzi yezonyango ngumthombo okhethekileyo wongcoliseko kuba iqulethe iindidi zeepathons, izinto eziyityhefu kunye neekhemikhali. Ukuba amanzi amdaka ezonyango akhutshwa ngokuthe ngqo ngaphandle konyango, iya kubangela ingozi enkulu kwindalo, indalo kunye nempilo yabantu. Ke, ...
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