The dangers of PCB exposure are well-documented, and the science is crystal clear - so much so that Congress banned the chemicals in 1976.

In 1933, the health effects of direct PCB exposure was seen in those who worked with the chemicals at the manufacturing facility in Alabama.

Monsanto tried for years to downplay the health problems related to PCB exposure in order to continue sales.

Liver disease and lung disease rates were low and not related to PCB exposure.

Even today, people who grew up at Northeast Cape have high rates of cancer and other diseases, possibly due to PCB exposure around the site.

The Jacobsons had previously linked prenatal PCB exposure to poor short-term memory in infants and young children.

Scientists have concluded that even low levels of PCB exposure here could have caused more serious illnesses than previously detected.

Previous studies had found extra cancer deaths after PCB exposure.

Instead, it uses estimates of human risks based on those experienced by animals in laboratory tests of PCB exposure.

But there's a suggestion from one Canadian study that polar bear cub survival might be compromised by high PCB exposure in their mother's milk.