Photo by Andrew Coop on Unsplash.


Researchers in the Journal Science report that a chemical in car tires, 6PPD-quinone (pronounced “kwih-known”), is a likely coho salmon killer. The chemical, used as a preservative in tires, was found to kill juvenile salmon in lab tests that replicated concentrations often found in nature. Warner Chabot, executive director of the San Francisco Estuary Institute, joins Gang Green to talk about the research and what California can do to protect its endangered salmon.


“The EcoNews Report,” Dec. 11, 2020.


A ubiquitous tire rubber–derived chemical induces acute mortality in coho salmon,” Science, Dec. 3, 2020.