Njengoba ukukhathazeka komhlaba wonke mayelana nokuntuleka kwamanzi kanye nokungcola kuqhubeka nokukhula, ukusesha ubuchwepheshe bokwelapha amanzi obusebenza kahle, obungabizi, nobuqhubekayo kuye kwanda. Okuphambili kulo msebenzi kume i-alumina (Al₂O₃), ikakhulukazi ezimeni zayo ezisebenzayo nezihlelekile, ezine...
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