Tag Archives: PCB

[ad_1] According to a new study, published in the journal Science, which revealed that killer whales, or orcas, are the most exposed to polychlorinated biphenyls (PCBs), formerly widely used as coolants and …

[ad_1] In some areas, killer whales eat mainly marine mammals and large fish such as tuna and sharks, and are then threatened by PCBs. In areas where killer whales eat mainly small …