Summary

The average person might be willing to pay a 10% premium for vehicle tires labeled as "salmon safe," according to a new study led by Washington State University. Several years ago, a paper co-led by WSU scientists found that a chemical compound called 6PPD , used to keep tires from breaking down too quickly, is toxic to coho salmon. When tire debris in the road ends up in freshwater streams, the chemical can kill the fish.

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