pcbs

Impact of pollutants on marine mammals
Extensive research on marine pollutants in marine mammals shows that these animals are exposed to toxic insecticidal compounds such as DDTs and PCBs.
The ocean is poisoned, half of the killer whales will die
Polychlorinated biphenyls (PCBs) were previously used to make electrical and plastic components that are one of the most toxic substances polluting the ocean.
Finding the polar bear's genitals is getting smaller and smaller
Research shows that chemical pollutants have weakened the penis, causing the polar bear to become extinct.