Salmon are dying off and your car tires might be to blame

Scientists found that a number of coho salmon died while swimming through urban waterways in the Pacific Northwest. (CREDIT: John R. McMillan, NOAA Fisheries/NWFSC/) Every fall, coho salmon undertake an epic journey from the ocean back to the freshwater streams and creeks where they were born so they can reproduce and then die shortly after. […]