"In the alphabet soup of Great Lakes contaminants, PCBs, PCDDs and PBDEs usually rule the broth.
But in a recent study, Canadian scientists took a closer look at another noodle.
They examined a group of seldom-studied, dioxin-like contaminants called polychlorinated naphthalenes, or PCNs. These chemicals can have toxic effects including chloracne and liver damage.
And although industry abandoned their use 30 years ago, the researchers still found the chemicals in lake trout collected from Lake Ontario from 1979 and 2004."