Exact(55)
PCB's are a serious threat.
Still, the persistent presence of heavy metals and PCB's in the harbor will probably preclude the school's students from eating city-bred oysters within their lifetimes.
Monsanto also deposited millions of pounds of PCB's in a hillside landfill just above the plant.
From 1946 until 1977, when the chemicals were banned, G.E. used PCB's to manufacture electric capacitors, and under state permits it was allowed to dump more than one million pounds of waste PCB's in the river.
"It's not just PCB's.
("It was the sparrow, that's true, but DDT and PCB's and mercury really killed him").
2. Research polychlorinated biphenyls (PCB's).
"I don't disagree that PCB's are harmful".
G.E. says dredging would stir up PCB's.
How can we prevent contamination by PCB's?
The PCB's got in the fish.
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