We can protect the killer whales by not polluting the water. Killer whales are dying everyday. People are not killing them, but adisease called Polychlorinated Biphenyls (PCBs) is. PCBs is a disease that causes the immune system to weaken, skin disease, liver damage, nervous disorders, and sometimes cancer. A lot of killer whales are dying from PCBs each day. We can protect them by not dumping salmon fat that has been exposed to PCB infected waters in Asia.