A chemical found in nearly all tires is responsible for mass die-offs of salmon along the U.S. West Coast, according to a study published in the journal Science.

As Elliot Johnson of Alaska Department of Fish and Game explains in the video, the Childs Glacier monitoring station is responsible for counting the returning salmon as they complete their ocean migration back to their native spawning...

Bill Webber and Bill Bailey are two longtime residents of Cordova, Alaska, whose livelihoods, and way of life revolve around the fishing industry. As we see in the video, both Webber, a third generation Alaskan fisherman, and Bailey, one...