Have any fish been contaminated in the Arctic Ocean?北冰洋里的鱼被污染了吗？

vast tracts of empty land, much of it contaminated by years of army activity大片空置的土地, 其中有不少由于持续多年的军事行动而受到污染

Nuclear-weapons plants across the country are heavily contaminated with toxic waste.有毒废弃物严重污染了全国的核武器工厂。