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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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Amid an Epic Drought the Salton Sea Shrinks - Once upon a time there was a huge, shallow manmade lake located in the Sonoran Desert of California. It was a resort destination for 50’s and 60’s Hollywood celebrities, now it is a playground for over 400 species of birds.


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