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段落1

This is Scientific American 60-Second Earth. I'm David Biello. Your minute begins now.

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Every time you wash your hair, a lot of shampoo goes down the drain.

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And if you're bothered by tiny white flakes, odds are you use a shampoo that deals with dandruff.

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Such medicinal shampoos often include a fungicide.

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A fair amount of fungicide thus ends up at the local wastewater treatment plant.

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Those industrial facilities remove a lot of stinky stuff.

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But they mostly fail to grab the drugs in soaps, shampoos, toothpastes, perfumes, sunscreen and other skincare products that our daily habits add to wastewater.

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Now a study has detected fungicides from anti-dandruff shampoos in the water.

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And even at concentrations as low as 0.5 micrograms per liter of H2O such fungicides can hurt many organisms, from tiny algae to big plants and fish.

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The study is in the journal Environmental Toxicology and Chemistry.

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Exposure to the fungicide is chronic:

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It gets repeated day after day after day.

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The algae just die.

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But bigger plants suffer retarded growth.

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And animals like fish are affected too, since they share similar cellular mechanisms with their distant relatives.

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We might want to start coming up with ways to get our dandruff shampoo,

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and other personal care products out of the drink.

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Your minute is up, for Scientific American 60-Second Earth. I'm David Biello.Thank for listening.

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