Chemical in tire dust killing Coho salmon, scientists warn

Scientists across the state are warning that a chemical from tire dust poses a major threat to coho salmon. Right now, environmentalists and state leaders are doing work to track this pollutant and find solutions.

It took two decades for local researchers from Washington State University, University of Washington, NOAA Fisheries and U.S. Fish and Wildlife to figure out that a chemical called "6PPD-quinone" was responsible for killing salmon in urban streams. This contaminant targets coho salmon - a population that is at an all-time low in Puget Sound.  

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