Zitsulo zolemera ndi gulu la kufufuza zinthu monga zitsulo ndi metalloids monga arsenic, cadmium, chromium, cobalt, mkuwa, chitsulo, lead, manganese, mercury, faifi tambala, tini ndi nthaka. Ma ion zitsulo amadziwika kuti amawononga nthaka, mlengalenga ndi madzi ndipo ndi poizoni ...
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