Male frogs exposed to low doses of a common weed killer (atrazine) can develop multiple sexual

Male frogs exposed to low doses of a common weed killer (atrazine) can develop multiple sexual organs, sometimes both male and female. EPA permits up to 3 parts per billion in drinking water. Frogs were affected at .1 part per billion. Atrazine also decreased male frog levels of testosterone to that of females.

Source: The New York Times, 4/17/02

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