Polychlorinated biphenyls (PCBs) as sentinels for the elucidation of Arctic environmental change processes: a comprehensive review combined with ArcRisk project results.

Environ Sci Pollut Res Int · 2018 · PMC6096556 · PMID 29956262

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The sentences

a decreasing trendno p-value reported

Pallas showed a similar trend as Zeppelin, with increasing concentrations until 2006 followed by a decreasing trend thereafter.

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