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Novel Fluorinated Compounds Discovered In Firefighters' Blood
ckwu writes: Perfluorinated compounds help firefighting foams rapidly flow over flaming liquids such as gasoline and jet fuel, cooling and quenching fires. But despite environmental scientists' concerns about these possibly toxic compounds, researchers don't know the identity of many of the chemicals in the mixtures on the market. For the first time, a new study borrows a medical research tool to pinpoint fluorochemicals in the blood of firefighters, identifying novel compounds that have never before been publicly reported.
...this was found in their blood, implying that the firefighters are just evolving a natural defense against fire.