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A Chemical Mystery in the Great Lakes
Polychlorinated Biphenylstoxic chemicals that were widely used in industry until they were banned in the 1970s.
A new study finds that levels of PCBs are declining in the air in the Great Lakes region. Except for one kind. It’s called PCB-11 and its levels are holding steady.
Ron Hites is a professor at Indiana University. He says researchers believe PCB-11 comes from yellow pigments and the way some yellow pigments are produced.
Hites says this suggests PCB-11 is still leaking into the environment, and he says he’s working to figure out where exactly the chemicals are coming from. One possibility he's investigating: the yellow paint that's used to make the stripes on roadways.
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