The secret contamination of polar bears

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Using a new approach to measure chemical contaminants in polar bears, scientists found a large variety of new chlorinated and fluorinated substances, including many new polychlorinated biphenyl metabolites. Worryingly, these previously unrecognized contaminants have not declined in the past decades, and many long-chain fluorinated alkyl sulfonic acids have been increasing over time, says the study.

from Latest Science News -- ScienceDaily https://ift.tt/2UaYtso

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