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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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Water Hyacinth is to Blame for Increase in Mosquito Population - Water hyacinth in Hussainsagar Lake, is being cited as the main reason for the increase in mosquitos. The dense mats of hyacinth, which has been growing for weeks aids in mosquito breeding that occurs between February and April.


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