Sue Wu submitted, created time 10 months 2 weeks (sciencenow.sciencemag.org)

Salmon in the U.S. Pacific Northwest, and elsewhere, have been in a world of hurt for decades. One of their main enemies is agricultural chemicals, such as chlorpyrifos. The pesticide interferes with salmon brains and harms their ability to feed, according to studies by zoologist Nathaniel Scholz of the National Oceanic and Atmospheric Administration in Seattle, Washington. Now Scholz's research is showing that mixtures of pesticides are even worse for salmon and can be surprisingly lethal.

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