Baltic sea
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Baltic Sea: an important sink of PCBs and PCDD/Fs in Europe. PCBs may have come mainly as air-borne pollution from Western Europe (see PCB – sources, and incinerators). PCDD/Fs (especially higher chlorinated PCDFs) may have their origin also in forest industries and their use of chlorophenols. The levels in the Baltic Sea peaked during the 1970s, and have been decreasing since, albeit slowly. Baltic levels have caused a number of environmental toxicological effects, e.g. reproduction problems of seals and eagles.