They're any contaminant or any toxin that is bioavailable to wildlife and wildlife consumers. For those communities that are remote—and there was some mention that 60% of indigenous communities in Canada are remote communities—their refrigerator's actually in the backwoods. They're drinking the water and eating the wildlife. Any contaminant like methylmercury or some of these PAHs—anything that is soluble in fat—is a great sort of metric of a contaminant that could impact some of these remote communities, because they become amplified up the food web and then they're consumed by the top consumers, who are often community members.
On November 17th, 2016. See this statement in context.