Iriburiro: Kwandika imbaho zicapye zumuzingo (PCBs) ukoresheje sisitemu yo kugenzura igihe nyacyo irashobora kuba umurimo utoroshye kandi utoroshye. Ariko, hamwe nibikoresho byiza, ubumenyi, nubuhanga, inzira irashobora kurangira neza. Muri ubu buyobozi bwuzuye, tuzakunyura mu ntambwe y'ibanze ...
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