Frogs & Weed Killer A new lab study links exposure to extremely low levels of the common weed killer atrazine to the appearance of feminine traits in male frogs. NPR's Richard Harris examines whether this means atrazine could be contributing the decline in frog numbers worldwide, and whether there are implications for human health.

All Things Considered

Frogs & Weed Killer

April 16, 200212:00 AM ET

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Frogs & Weed Killer

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A new lab study links exposure to extremely low levels of the common weed killer atrazine to the appearance of feminine traits in male frogs. NPR's Richard Harris examines whether this means atrazine could be contributing the decline in frog numbers worldwide, and whether there are implications for human health.