Ni irihe bara ryibibaho bya PCB, nkuko izina ribigaragaza, mugihe ubonye ikibaho cya PCB, cyane cyane kubona ibara ryamavuta kurubaho, ni ukuvuga, muri rusange tuvuga ibara ryibibaho bya PCB, amabara asanzwe ni icyatsi, ubururu, umutuku n'umukara n'ibindi.Xiaobian ikurikira basangira imyumvire yabo y'amabara atandukanye.