Personal Health

How a Big Agribusiness Firm Infiltrated the EPA and Made a Mockery of Science

Expensive coverups have kept a dangerous chemical in America's water supply.

Photo Credit: Marcin Balcerzak /

Earlier this year, in an exposé in The New Yorker, Rachel Aviv detailed the story of Syngenta, an agribusiness firm that was sued by the community water systems of six states in a class-action lawsuit over the firm’s herbicide atrazine.

Atrazine is the second most commonly used herbicide in the US and is used on more than 50% of all corn crops. It is one of Syngenta’s most profitable chemicals with sales at over $300 million a year. Banned in the EU, atrazine remains on the market in the US despite scores of scientific publications demonstrating its role in abnormal sexual development. Almost insoluble in water, atrazine contaminates drinking water supplies at 30 times the concentration demonstrated to cause severe sexual abnormalities in animal models

Recently unsealed court documents from the lawsuit have disclosed how Syngenta launched a multimillion-dollar campaign to disrepute and suppress scientific research, and influence the US Environmental Protection Agency to prevent a ban on atrazine.

Tyrone Hayes, a professor of Integrative Biology at UC Berkeley has demonstrated in his research that atrazine leads to health problems, reproductive issues and birth defects. Hayes is a vocal proponent of legislative action to ban the dissemination of atrazine in water supplies. The court documents showed that Syngenta specifically attacked Hayes’ work with its smear campaign.

In addition to smear campaigns, Syngenta hired a private detective agency to look into the personal backgrounds of scientists on an advisory panel at the EPA, the judge presiding over the lawsuit, and Hayes. The documents also reveal a host of third-party organizations and independent "experts" who were on Syngenta’s payroll and supplied with Syngenta’s data in order to make public statements or write op-ed pieces in support of atrazine. Often, these experts were supplied directly with material that company employees edited or wrote.

Syngenta’s Coverup

It all started in 1997 when Hayes was employed by Syngenta to study atrazine, which was under review by the EPA. Hayes’ experimental research on the developmental growth of frogs began to reveal that even at levels of atrazine as low as 0.1 parts per billion (ppb), the chemical was capable of causing males to develop as hermaphrodites. Some males developed female organs and were even capable of mating with normal males and producing eggs. As reported in top peer-reviewed journals such as PNAS and Nature, at exposure to 0.1 ppb atrazine the frogs showed extremely reduced levels of testosterone and feminized voice boxes.

As Hayes amassed data, Syngenta downplayed his results, citing problems with statistics or asking him to repeat studies, often nitpicking or questioning his credibility or scientific skills.

In 2000, Hayes resigned from the panel. He continued to speak at conferences, publicizing his ongoing research in the lab. Meanwhile, Syngenta employees began to show up at conferences to publicly besmirch his data. Sporadically, the campaign turned into threats of violence. In a Democracy Now interview with Amy Goodman, Hayes said:

“Tim Pastoor, for example, before I would give a talk, would literally threaten, whisper in my ear that he could have me lynched, or he said he would send some of his 'good ol’ boys to show me what it’s like to be gay,’ or at one point he threatened my wife and my daughter with sexual violence.”

Shockingly, even though Syngenta settled the lawsuit for $105 million in late 2012 after eight years of litigation, it still maintains that amount of atrazine present in the water is much lower than would be required to cause damage. In an article in Forbes published a week after the New Yorker story, Jon Entine criticized Hayes and claimed that “after numerous follow up studies by the EPA and a score of scientists… evidence of endocrine related problems Hayes claimed to have identified… are nowhere to be found.”

This is a patently false assertion. A mere scientific literature search shows dozens of peer-reviewed articles showing atrazine-induced defects in animal models. A number of papers on salmon and fish find similar results to those in frog: fish exposed to atrazine showed major reproductive abnormalities in both males and females, low sperm counts and low testosterone levels in males. Similar defects have been observed in reptilesResearch in rats has demonstrated decreased fertility, effects on sperm count, increased prostate disease in males and poor mammary development. A collaborative effort of an international team of scientists confirmed these studies by demonstrating feminization of male gonads across vertebrate species.

All signs point toward the same being true for humans. Said Hayes:

“A number of epidemiological studies in humans have associated atrazine with impaired reproduction and a decline in sperm count and fertility. Another study looking at increased prostrate disease in workers who are exposed to atrazine in the production plant in St. Gabriel, Louisiana. A number of studies now show birth defects in humans exposed to atrazine: gastroschisis where the intestines are on the outside of the baby when it’s born, choanal atresia, an effect where the oral cavity and the nasal cavity close up. Most recently, there’s been work showing atrazine associating with three different types of genital abnormalities in males.”

Corruption Within the EPA

Interestingly, the scientific advisory panel to the EPA recognizes this wealth of scientific data. In a memo from the 2012 review the advisory panel repeatedly calls attention to the biased methodology employed by the EPA. In fact, the advisory panel disagreed with almost every conclusion the EPA made.

Hayes explained: “The panel was only making recommendations, they don’t make decisions and so the EPA doesn’t need to listen to them. This really undermines the role of the scientific advisory panel.”

Syngenta was closely involved with the EPA’s decision. The EPA mainly considered just one study that found inconclusive effects of atrazine. This was the sole premise for the EPA’s decision. It was based on the research of a group led by Kloas Werner. Said Hayes:

“Kloas Werner was originally on the EPA scientific advisory panel that I presented my data to. He at that time was hired by Syngenta and subsequent to being on the panel he conducted a study in collaboration with the EPA and Syngenta and reported back to the panel that he was on. The panel’s conclusion was that more work needed to be done, and then he presented back to that panel. Essentially, his previous decision helped him get the money for his study. Furthermore, they selected a strain of frogs that don’t respond even to estrogen, which was acknowledged by the advisory panel which reviewed their work.”

But Syngenta wasn’t satisfied with bad science and corruption within the EPA. As Syngenta was hiring Werner, a scientific advisory panel member who could sway the EPA review process, it also held scores of closed-door meetings with panel members. As the documents reveal, Syngenta also hired a communications consultancy, the White House Writers’ Group, to set up meetings with members of Congress and Washington bigwigs to discuss upcoming EPA reviews.

The information about Syngenta’s misdeeds has had little to no effect. The fiction that Hayes is a scientific hack continues to pervade the work of pro-Syngenta writers like Entine. These columnists, who write from corporation-apologist perspectives, bolster the fiction by glossing over critiques of the EPA and pretending like its conclusions represent uncontroversial scientific consensus.

Time and time again, these "third-party allies" of Syngenta hyperbolically talk about the "scientific method," and suggest that science is science, regardless of the angle of the investigator (none have much to say about Werner’s estrogen-insensitive frogs). For them, it seems, there is no conceivable way Syngenta employed techniques that would furnish them with results to protect its multimillion-dollar profits.

In other words, for them, "conflict of interest" means nothing. Scientific publishing is uncompromising about this: journals require the disclosure of conflicts of interest in publications. Obviously, political and financial incentives are sufficient criteria to change scientific results because they deeply influence the way experimenters do science.

Unsurprisingly, the Kloas paper failed to declare any conflict of interest.

“How can you declare no conflict of interest when clearly the manufacturer benefits from the conclusions drawn by that paper as well as benefits from the decisions made by the EPA advisory panel?” Hayes said. “Especially when the member was both on the panel and was paid by Syngenta.”

Corporation v. Science

Syngenta frequently alleges that Hayes never made his data on atrazine publicly available, a damning indictment that makes it seem like his data could have been fabricated. Hayes said this is not the case.  

“The work that I did for Syngenta, Syngenta owns all that raw data,” he said. “This includes the generated raw data, the transcribed typed data, and really everything. The EPA actually visited my lab. Members of the EPA actually were in my laboratory, they observed all of our processes and data collection. Mary Frankenberry, a statistician, actually analyzed the data herself.”

Syngenta and its supporters also rely heavily on the vitriol that Hayes hardly seems like a disinterested, objective scientist. Rich criticism from a company that hires people to obtain the scientific results it wants.

Hayes has spoken widely, set up a website and rapped about Syngenta’s powerful lobbying to keep atrazine on the market. There is, however, a fundamental distinction between a company lobbying to get its favored scientific result, and a scientist who vocally defends his scientific results. Hayes’ response isn’t surprising or unusual. Scientists often claim ownership over their results and will doggedly defend them at conferences.

The actions of big corporations like Syngenta, especially when dealing with highly profitable products, reveal a broader truth about the nature of corporate power. There is a dangerous trend in which corporate fiat is used to call scientific research into question and sway governmental policy. This trend puts millions of lives at risk as hazardous products avoid regulation and remain on the market.

One wonders why the burden isn’t on Syngenta for proving without a doubt that atrazine has no effects before plying the entire population with a highly dangerous chemical. Even if it wasn’t a near-certainty that atrazine causes birth defects, why wouldn’t we require regulatory bodies such as the EPA to err on the side of caution?

Today, atrazine remains legal and in the water supplies of millions of Americans, despite evidence from scores of labs outside Tyrone Hayes’ showing it to be hazardous.

 “In the 15 plus years that I’ve had experience with the EPA,  I don’t really have a lot of faith that we’re going to get an objective review that’s really going to focus on environmental health and public health with regards to atrazine, or any other chemical for that matter,” Hayes said.

Who can blame him?

Kamil Ahsan is a freelance journalist and a doctoral student in developmental biology at the University of Chicago.