"We all follow the Tyrone Hayes drama, and some people will say, ‘He should just do the science.’ But the science doesn’t speak for itself. Industry has unlimited resources and bully power."
The E.P.A. found that all seventeen atrazine studies, including Hayes’s, suffered from methodological flaws—contamination of controls, variability in measurement end points, poor animal husbandry—and asked Syngenta to fund a comprehensive experiment that would produce more definitive results.
He wrote that what he called “hermaphroditism” was induced in frogs by exposure to atrazine at levels thirty times below what the E.P.A. permits in water. He hypothesized that the chemical could be a factor in the decline in amphibian populations, a phenomenon observed all over the world.
The difference, he said, was that the “scientific debate spilled into Hayes’s emotional life.”
[Syngenta's senior manager Ann Bryan] recommended that I speak with the author of the review, David Schwartz, a neuroscientist, who works for Innovative Science Solutions, a consulting firm that specializes in “product defense” and strategies that “give you the power to put your best data forward.” Schwartz told me that epidemiological studies can’t eliminate confounding variables or make claims about causation. “We’ve been incredibly misled by this type of study,” he said.
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