1. Ukunyangwa kwangaphambili kwamanzi okwenza imizimba yamanzi yendalo ihlala iqulethe udaka, udongwe, i-humus kunye nezinye izinto ezimisiweyo kunye nokungcola kwe-colloidal kunye neebhaktheriya, i-fungi, i-algae, i-virus kunye nezinye ii-microorganisms, zinozinzo oluthile emanzini, luphambili. unobangela wokudumba kwamanzi, umbala kunye nevumba.I...
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