Coho choke on road runoff

Something’s killing Seattle’s coho salmon, and now, scientists know what it is: road runoff. Learn how they figured it out, and what cities can do to help, in my podcast for Scientific American.

 

Coho salmon often die before they spawn in urban waterways. (Credit: BLM via Flickr)
Coho salmon often die before they spawn in urban waterways. (Credit: BLM via Flickr)
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