International Agency for Research on Cancer

July 11, 2024

Congress should follow science and reject Bayer push to block lawsuits

By Nathan Donley

Millions of American users of glyphosate-based Roundup have likely assumed the Environmental Protection Agency (EPA) would never have approved the pesticide unless it was safe.

But the science-based truth has never been as cut and dried as the EPA and Bayer, which bought Roundup maker Monsanto in 2018, have made it sound. In a series of trials across the country, juries – and the public – have learned that despite the safety claims by Bayer and the EPA, hundreds of studies by independent scientists link glyphosate herbicides to serious health harms, including cancer.

Even though Bayer maintains that its glyphosate products are safe and not carcinogenic, the company has thus far agreed to pay out more than $10 billion in settlement costs to tens of thousands of glyphosate users suffering from non-Hodgkin lymphoma (NHL), and thousands of lawsuits remain.

In an effort to block further litigation, the chemical giant has turned its focus to getting federal and state legislation passed to block Roundup users from suing the company for damages. According to a recent Washington Post article, Bayer helped draft language for a legislative measure that would limit the types of lawsuits brought by the Roundup users. That measure is included in the US House of Representatives version of the 2024 Farm Bill, which is slated to be finalized later this year. The company has also been pushing lawmakers in several states to pass similar measures.

Key to Bayer’s messaging to legislators is that, because glyphosate is EPA-approved, research showing its harms should be rejected. But the process by which the EPA approved glyphosate decades ago has never been reassuring to independent scientists such as myself.

July 10, 2024

In bid to slash chemical use, robots take on farm fields

By Carey Gillam

Cheney, Kan. – On a sweltering summer day in central Kansas, farm fields shimmer in the heat as Clint Brauer watches a team of bright yellow robots churn up and down the rows, tirelessly slicing away any weeds that stand in their way while avoiding the growing crops.

The battery-powered machines, four feet long and two feet wide, pick their way through the fields with precision. Programmed with myriad data points about the field, the artificial intelligence (AI)-driven bots run without any human hand to guide them.

Brauer, a former California-based tech executive who moved back to his family farm in central Kansas after his father developed Parkinson’s disease, sees the robots as critical tools to help farmers reduce their reliance on chemicals and be more protective of their health and the environment.

His Greenfield agricultural technology company now builds and programs its robots in a shed behind an old farmhouse where his grandmother once lived. Farmers who hire the robots are charged a flat rate per acre weeded. Twenty farmers are signed up for the robotic services this season, and the company hopes to weed 10,000 acres this year.

“The answer is here,” he said. “This solves a lot of problems for farmers.”

Greenfield is one of many agricultural robotic companies springing up amid a confluence of concerns over the future of farming. Fears about the harmful impacts of farm chemicals on the environment and on public health are key drivers, as is the need to deal with the diminishing effectiveness of overused weed killing chemicals, labor shortages, and the high costs that farmers face with conventional farming practices.

Financial backing is flowing to these companies from venture capital funds, private investors and large food and agricultural companies eager to make bets on the bots as a means to promote more sustainable food production – a notion increasingly finding favor with consumers.

The investment arm of Chipotle Mexican Grill, a global restaurant chain, is among Greenfield’s investors. Christian Gammill, who leads Chipotles venture fund, said Greenfield’s work is “important and impactful.” Greenfield has raised about $12 million in capital, and is seeking more, according to Brauer.

ReGen Ventures, a venture capital fund operating in Australia and the US, has so far sunk $6 million – with more planned – into North Dakota-based Aigen Robotics, which uses AI and camera vision to sense plants and remove weeds while avoiding crops. Aigen declares on its website to be “building a future with no harmful chemicals in our food.” The compact robots are powered via solar panels fixed to the top of each machine and are designed to work autonomously, sleeping and waking up on farms fields.

“They are well on their way to displacing chemicals from ag and enabling a new, regenerative food production system,” said ReGen founder Dan Fitzgerald.

June 12, 2024

Biofuels manufacturing found to be a significant source of hazardous air pollution

By Dana Drugmand

Hazardous air pollutants emitted in the manufacturing of biofuels is nearly as bad as air pollution stemming from oil refineries, and for several types of dangerous pollutants such as formaldehyde the emissions from biofuel production are far greater, a new report finds.

The assessment, which was conducted by researchers with the environmental watchdog group Environmental Integrity Project (EIP), looked at emissions generated by 275 ethanol, biodiesel and renewable diesel facilities in the United States. The researchers found that the facilities frequently violated air pollution permits while at the same time benefiting from legal exemptions and federal policy supports such as fuel-blending mandates.

As the biofuels industry continues expanding with more than 30 new facilities under construction or proposed, the industry should be seen as a threat to public health, the report warns. Stronger regulatory oversight from the Environmental Protection Agency (EPA) is needed, according to EIP.

“Despite its green image, the biofuels industry releases a surprising amount of hazardous air pollution that puts local communities at risk – and this problem is exacerbated by EPA’s lax regulation” Courtney Bernhardt, EIP director of research, said in a statement.

According to the EIP report released on Wednesday, biofuels manufacturing generated 12.9 million pounds of hazardous air pollutants in 2022. That compares to 14.5 million pounds of hazardous air pollutants emitted by oil refineries that year, according to data from EPA’s Toxic Release Inventory.

Emissions from biofuel factories were significantly higher than oil refineries for four types of hazardous pollutants – formaldehyde, acetaldehyde, acrolein, and hexane, according to the EIP report. In 2022, biofuel facilities reported releases of nearly 7.7 million pounds of hexane, over 2.1 million pounds of acetaldehyde, 235,125 pounds of formaldehyde, and 357,564 pounds of acrolein. By comparison, oil refineries that year emitted 2.6 million pounds of hexane, 10,420 pounds of acetaldehyde, 67,774 pounds of formaldehyde, and zero pounds of acrolein.

corn christophe-maertens-v9r31Dxg0X0-unsplash (2)

March 6, 2024

Mexico’s precaution on GM corn safety is justified

By Lucy Sharratt

A Presidential decree has banned the use of genetically modified (GM) corn for food in Mexico. But the governments of the United States and Canada are using the US-Canada-Mexico trade agreement (USMCA) to challenge Mexico’s actions.

The purpose of Mexico’s restrictions on GM corn is to safeguard the integrity of native corn from GM contamination and to protect human health. The purpose of the US and Canadian challenge is to defend the interests of the biotechnology industry. The US and Canada want to force Mexico to open its market to all genetically modified foods and seeds. Canada is supporting the US challenge (as a third party in the dispute) even though Canada does not export any corn to Mexico.

Mexico has the right to restrict the use of GM corn. The US argues that Mexico’s actions are not based on scientific principles, but the government has sufficient science to justify its precautionary policies.

Our organization, the Canadian Biotechnology Action Network, is a large network of farmer and environmental groups that has been monitoring the use of genetically modified organisms (GMOs) for over 15 years, and we support Mexico’s restrictions. We were one of two Canadian groups that were given permission to send expert comments on the risks of GM corn to the arbitration panel in this dispute, but in January, Canadian groups were uninvited at the request of the US government, supported by Canada, on the technicality that the dispute is just between the US and Mexico.

We published our analysis anyway, to show that Mexico’s ban is supported by the science. Research continues to find indicators of potential harm to humans from eating GM insect-resistant corn. The science also continues to warn of health impacts from exposure to the herbicide glyphosate, which is used in GM corn production.

A typical pen format for swine in many Iowa animal feeding operations

March 4, 2024

New report sparks questions and controversy over possible causes for Iowa “cancer crisis”

By Keith Schneider

Amid increasing scrutiny of a potential link between Iowa farm chemicals and cancer, a new report is generating controversy as it blames rising cancer rates not on the toxins used widely throughout the state, but on something else entirely: binge alcohol consumption.

The Iowa Cancer Registry, a health research group housed at the University of Iowa, reported on February 20 that Iowa has the second-highest and fastest-rising incidence of cancer among all states. An estimated 21,000 new cancer cases are expected to develop this year and 6,100 Iowans will die from cancer, Iowa Cancer Registry Director Mary Charlton said in announcing the new report. Iowa, she said, has the highest rate of binge drinking in the Midwest with 22% of residents reporting binge drinking, more than the national average of 17%. Overall, Iowa has the 4th highest incidence of alcohol-related cancers in the US, according to the report.

“Alcohol is a known carcinogen and a risk factor for several cancers including oral cavity, pharynx, larynx, esophagus, rectum, liver, and female breast cancers,” Charlton said in a news conference.

The assessment has drawn questions and sparked doubts, however, from state leaders and health and environment researchers who have been calling for a probe into just how much the state’s agricultural industry may be contributing to the spread of disease.

“Is alcohol responsible for the increase in cancer incidence here since 2014? I personally doubt that,” said James Merchant, a retired professor of occupational and environmental health, and former dean of the University of Iowa College of Public Health.

“What needs to be looked at are things that are probable or possible carcinogens that have increased beginning about 1990, because of the well-recognized latency of environmental cancers,” Merchants said. “Those carcinogens associated with industrial agriculture are the ones that really need to be looked at very closely.”

December 12, 2023

Ohio PFAS class action lawyers slam US judges; seek rehearing

By Shannon Kelleher

A federal appeals court should grant a rehearing in a class action lawsuit filed against the makers of toxic PFAS chemicals after a panel of three federal judges disregarded legal precedent and misstated crucial facts in rejecting claims of liability alleged against PFAS makers, according to a petition filed by plaintiffs’ lawyers in the closely watched legal battle.

The request for rehearing comes after last month’s ruling by the Cincinnati, Ohio-based 6th US Circuit Court of Appeals, which reversed a lower court’s approval of the lawsuit brought on behalf of Ohio residents who want PFAS makers 3M, DuPont and others to pay for medical monitoring and studies that will analyze the health impacts of PFAS contamination the residents have been exposed to. The plaintiff’s attorneys have requested either a panel rehearing; a hearing before all judges of the court; or permission for the plaintiff to refile.

Lead plaintiff Kevin Hardwick worked as a firefighter for 40 years and used PFAS-containing foams at work. He alleges that ten companies, including chemical giants 3M, DuPont, and related companies, caused his blood -and the blood of other Ohio residents – to become contaminated with potentially dangerous levels of PFAS chemicals. The judges who rejected the allegations said in their opinion that Hardwick could not trace the chemicals in his blood back to the ten defendants, citing “the thousands of companies that have manufactured chemicals of this general type over the past half-century.”

In the filing by plaintiffs’ lawyers on Monday, the lawyers for the class action said the judges were factually wrong on multiple fronts, including stating that there are thousands of PFAS manufacturers. One of the PFAS toxins found in Hardwick’s blood is perfluorooctane sulfonic acid (PFOS). PFOS has only been made by defendant 3M, for instance, a fact not even disputed by 3M, the petition states. Another type of PFAS found in his blood was perfluorooctanoic acid (PFOA).

“Defendants do not dispute that they caused PFOA (and other PFAS) to be created and deposited into human blood. Nor do they dispute that that these toxins did not exist before Defendants created them,” the Hardwick petition states. The defendants additionally have been identified by the US EPA as “known makers” of PFOA, according to the petition for rehearing.

December 1, 2023

Chemical found widely in the environment causes cancer, global experts determine

By Shannon Kelleher

A group of global scientific cancer experts this week classified a widespread chemical known as PFOA as carcinogenic to humans, confirming decades of research, and building on concerns about human and animal exposure to that chemical and to the larger class of manmade substances that are commonly known as “forever” chemicals because of their persistence in the environment. Separately, the experts deemed a related chemical called PFOS as possibly carcinogenic to humans.

The classifications, published Thursday in The Lancet Oncology, were determined by a working group of 30 experts from around the world through the International Agency for Research on Cancer (IARC), an arm of the World Health Organization (WHO). The experts convened in Lyon, France Nov. 7-14 to review published literature on the health risks of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS). Both are types of per-and poly fluoroalkyl substances (PFAS).

“This latest action highlights and reaffirms the concerns we have been raising for decades that these man-made ‘forever chemicals’ present a serious threat to human health, mandating that appropriate steps be taken to prevent and address exposures,” said Rob Bilott, an environmental lawyer for the Ohio-based firm Taft Law who has spent over two decades exposing the dangers of PFAS chemicals.

In classifying PFOA as carcinogenic, the IARC scientists said they found “sufficient” evidence for cancer in experimental animals exposed to PFOA and “strong” evidence that the chemical affects gene expression and immune response in humans exposed to PFOA. They also found limited evidence for cancer in humans, identifying a link to renal cell cancer and testicular cancer.

The scientists said that the research shows PFOS is “possibly” carcinogenic to humans. They said they found strong mechanistic evidence that the chemical affects gene expression and immune response in exposed humans, along with several other key characteristics of carcinogens. They also found limited evidence linking PFOS to cancer in experimental evidence but ‘inadequate evidence’ linking it to cancer in humans.

It remains to be determined how, or if, the new classifications may impact thousands of lawsuits that are pending in US courts against PFAS makers DuPont and 3M. The companies have been sued by individuals as well as by drinking water utilities and municipalities over alleged harms tied to PFAS contamination.

On Monday, a US appeals court turned back a large class action lawsuit brought on behalf of Ohio residents, finding there was not sufficient proof that the companies caused the exposure alleged in the case. Lead plaintiff Kevin Hardwick, who worked as a firefighter for 40 years and used PFAS-containing foams, brought the suit in 2018, alleging that the companies caused his blood to become contaminated with potentially dangerous levels of PFAS chemicals. Hardwick asked for a panel of scientists to study the effects of PFAS in his body and for medical monitoring.

March 16, 2023

Monsanto accused of wrongly excluding non-US citizen from Roundup settlement

By Huanjia Zhang

(This story was originally published in Environmental Health News and is republished here with permission.)

Monsanto Co. and its corporate parent Bayer are facing a federal lawsuit for civil rights violations after they allegedly excluded a farmworker from a Roundup cancer settlement because of her immigration status.

According to the lawsuit, which was filed in the US District Court for the Western District of Virginia, plaintiff Elvira Reyes-Hernandez is a migrant farmworker who worked on Virginia tree farms between 2015 and 2018, during which she sprayed the herbicide Roundup regularly.

In 2015, the World Health Organization’s International Agency for Research on Cancer (IARC) listed glyphosate, the active ingredient in Roundup, as “probably carcinogenic to humans.” Over the years, a wide body of scientific evidence has also pointed to glyphosate exposure as causing an increased risk of non-Hodgkin lymphoma.

Reyes-Hernandez was diagnosed with non-Hodgkin lymphoma in 2019 and subsequently sued Monsanto, claiming that Roundup exposure had a role in causing her cancer.

“Monsanto is very likely making calculated risks based on the characteristics of the people who are using their products,” said Katy Youker, an attorney for Lawyers’ Committee for Civil Rights Under Law and a co-counsel for the case.

By excluding non-US citizens from the settlement program, she said, Monsanto is effectively putting up a huge barrier for migrant farmworkers — most of whom do not have citizenship but are at the forefront of Roundup exposure — from seeking restitution.

This case could send an encouraging message to migrant and undocumented farmworkers who wish to bring legal action against the company. However, legal experts and farmworker advocates are still pessimistic about the prospect of them coming forward, especially when facing a myriad of hurdles and obstacles.

March 1, 2023

California researchers link popular weedkiller to health problems in young adults

By Carey Gillam

Children exposed to a weedkiller commonly used in farming, as well as on residential yards and school playgrounds, appear to be at increased risk for liver inflammation and metabolic disorders in young adulthood and more serious diseases later in life, according to a study published Wednesday in the journal Environmental Health Perspectives.

The research, which was conducted by several California scientists and health researchers, including from the University of California, Berkeley School of Public Health, is the latest of many studies linking glyphosate herbicide to human health problems.

Glyphosate is better known as the active ingredient in Monsanto’s Roundup products as well as scores of other weedkilling brands sold around the world. The chemical is considered the most widely used herbicide in history, and residues are commonly present in food and water, as well as in human urine.

Monsanto and Bayer AG, which bought Monsanto in 2018, maintain that Roundup and other glyphosate-based herbicides are safe when used as directed, and say the weight of scientific evidence demonstrates that safety. But more than 100,000 people in the US have alleged exposure to the weedkiller caused them to develop non-Hodgkin lymphoma. Many independent scientific studies have linked glyphosate to cancers as well as liver disease, endocrine disruption and other health problems.

In the new study, researchers tracked 480 “mother-and-child duos” who live in the Salinas Valley of California, a key agricultural area, analyzing levels of glyphosate weed killer used in the area and levels of the weedkiller present in the urine of the mothers while they were pregnant and in the children as they grew. They also took into account levels of a degradation product of glyphosate known as AMPA in the urine of the study subjects. The researchers then assessed the liver and metabolic health of the children at the age of 18.

They concluded that higher levels of glyphosate residue and AMPA in urine in childhood and adolescence were associated with higher risk of liver inflammation and metabolic disorders in young adulthood. In addition, they found that agricultural use of glyphosate near participants’ homes from birth and up through age five was associated with metabolic disorders at age 18. Metabolic disorders in youth can lead to heart disease, stroke, type 2 diabetes, and liver disease later in life.

Both metabolic problems and liver disorders are increasing among children and young adults, according to the study.

January 19, 2023

New US research finds “worrying” evidence linking Monsanto weedkiller to cancer

By Carey Gillam

New research by top US government scientists has found that people exposed to the widely used weed killing chemical glyphosate have biomarkers in their urine linked to the development of cancer and other diseases.

The study, published last week in the Journal of the National Cancer Institute, measured glyphosate levels in the urine of farmers and other study participants and determined that the presence of the pesticide was associated with signs of a reaction in the body called oxidative stress, a condition that causes damage to DNA. Oxidative stress is considered by health experts as a key characteristic of carcinogens.

The authors of the paper – 10 scientists with the National Institutes of Health and two from the Centers for Disease Control and Prevention (CDC) – concluded that their study “contributes to the weight of evidence supporting an association between glyphosate exposure and oxidative stress in humans.” They also noted that “accumulating evidence supports the role of oxidative stress in the pathogenesis of hematologic cancers,” such as lymphoma, myeloma and leukemia.

“Oxidative stress is not something you want to have,” said Linda Birnbaum, a toxicologist and former director of the National Institute for Environmental Health Sciences. “This study increases our understanding that glyphosate has the potential to cause cancer.”

The study findings come after the CDC reported last year that more than 80% of urine samples drawn from children and adults contained glyphosate. The CDC reported that out of 2,310 urine samples taken from a group of Americans intended to be representative of the US population, 1,885 were laced with detectable traces of glyphosate.

Glyphosate is the most heavily applied herbicide in history, both in the US and globally. One of the best-known glyphosate-based products is Monsanto’s Roundup weedkiller. Roundup has been used by farmers as well as consumers for more than 40 years. Monsanto has always assured the public and regulators that exposure to the weed killer does not pose a threat to human health, but many independent scientists say there is a wealth of evidence to contradict those assurances.

People are exposed to glyphosate by using products made with the chemical and also by eating food and drinking water contaminated with the pesticide. Scientists have found glyphosate residues in an array of popular foods and in waterways across the US.

Notably, in the new paper, the NIH and CDC scientists said that while their study focused on farmers who were exposed to glyphosate when they sprayed it on fields, they saw similar results in “non-farmers.”

The findings suggest “these effects may apply more broadly to the general population who are primarily exposed through ingestion of contaminated food and water or residential applications,” the study authors wrote.

The study is so significant that it warrants regulatory attention, said some independent scientists.

“This is a top level team of investigators and a highly credible study to which regulators need to pay attention,” said Phil Landrigan, a pediatrician and epidemiologist who worked for years at the CDC and the Environmental Protection Agency (EPA) and now directs the Program for Global Public Health and the Common Good at Boston College.

Michael Antoniou, a scientist with the department of medical and molecular genetics at King’s College in London who has been researching glyphosate for years, said the results were “worrying,” with “major health implications.”