Understanding the human body is a team effort. That's where the Yachtel group comes in.

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To learn more about Yachtolt, visit yawcult.co.

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This is Scientific American 60-second science. I'm Julia Rosen. Got a minute?

Each fall, thousands of coho salmon flocked to Northwest Rivers to spawn, but many never get the chance, especially near big cities like Seattle.

And in some of these urban areas, up to 90% of the females were dying before they spawned, which is not a good thing for a population.

Julanne Spromberg, a toxicologist affiliated with the Northwest Fisheries Science Center.

Researchers suspected these deaths were partly a matter of bad timing. The fish often reached

streams during the first showers of the rainy season, which flush chemicals from roads and

parking lots into the water. Now Sbromberg and her

colleagues have produced the first direct evidence that this runoff kills Coho salmon. Their study

is in the Journal of Applied Ecology. The researchers found that fish exposed to stormwater from

Seattle area highways quickly grew sick and died. Surprisingly, though, the salmon didn't seem to mind taking a dip

in a cocktail of common road pollutants, including hydrocarbons and metals. That detail suggests

the killer ingredient in runoff may be a different kind of chemical or a lethal combination

of several compounds. There's a whole lot of stuff in here that we haven't been able to measure

or don't have the capabilities of measuring at this point. However, Spromberg says there's a way to help the fish

even before scientists hunt down the culprit. Her team also found that filtering runoff through just a

few feet of soil made stormwater safe for salmon. Cities can implement this simple form of clean

water technology by building more systems, including

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