Minnesota Public Radio slideshow:
The long reach of perfluorochemicals
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PFOS and PFOA are man-made chemicals, where carbon is attached to fluorine. They're sometimes called "C8," because they contain eight carbon molecules. The compounds are extremely stable and don't break down in the natural environment. (Image courtesy of Prof. John Giesy, Michigan State University)

PFOS and PFOA are man-made chemicals, where carbon is attached to fluorine. They're sometimes called "C8," because they contain eight carbon molecules. The compounds are extremely stable and don't break down in the natural environment.

(Image courtesy of Prof. John Giesy, Michigan State University)
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