science

August 30, 2024

California passes law ordering review of paraquat weed killer

By Carey Gillam

Efforts by some California lawmakers to ban the controversial weed killing chemical paraquat ended this week with passage of a law that keeps the chemical in use but requires a reevaluation by regulators within the next five years.

Backers of a ban cited scientific evidence linking paraquat to a range of health problems, including the incurable brain disease known as Parkinson’s, as a key reason to outlaw paraquat use in the state.

The California State Assembly earlier this year had approved what was referred to as a “moratorium” on paraquat that would have taken effect in January 2026 and provided for a process that have would have given state regulators an opportunity to reevaluate paraquat and potentially reapprove the chemical with or without new restrictions.

But state Senate amendments killed any moratorium or restriction on use. The bill, as passed, now only requires state pesticide regulators to complete a reevaluation of paraquat by January 2029.

California Assemblymember Laura Friedman said the fact that the legislature passed requirements for a regulatory reevaluation is still a win.

“With the mounting medical evidence indicating that paraquat is simply too toxic to remain in wide use, I am very confident that [state regulators] will not only do a thorough re-evaluation of paraquat, but either ban it outright or place greater restrictions on its use,” Friedman said in a statement.

August 20, 2024

“It’s scary”- Scientists finding mounting evidence of plastic pollution in human organs

By Douglas Main

A growing body of scientific evidence shows that microplastics are accumulating in critical human organs, including the brain, alarming findings that highlight a need for more urgent actions to rein in plastic pollution, researchers say.

Different studies have detected tiny shards and specks of plastics in human lungs, placentas, reproductive organs, livers, kidneys, knee and elbow joints, blood vessels, and bone marrow.

Given the research findings, “it is now imperative to declare a global emergency” to deal with plastic pollution, said Sedat Gündoğdu, who studies microplastics at Cukurova University in Turkey.

Humans are exposed to microplastics – defined as fragments smaller than five millimeters in length – and the chemicals used to make plastics from widespread plastic pollution in air, water, and even food.

The health hazards of microplastics within the human body are not yet well-known. Recent studies are just beginning to suggest these particles could increase the risk of various conditions such as oxidative stress, which can lead to cell damage and inflammation, as well as cardiovascular disease.

Animal studies have also linked microplastics to fertility issues, various cancers, a disrupted endocrine and immune system, and impaired learning and memory.

There are currently no governmental standards for plastic particles in food or water in the United States. The Environmental Protection Agency is working on crafting guidelines for measuring them, and has been giving out grants since 2018 to develop new ways to quickly detect and quantify them.

Finding microplastics in more and more human organs “raises a lot of concerns,” given what we know about health effects in animals, studies of human cells in the lab, and emerging epidemiological studies, said Bethanie Carney Almroth, an ecotoxicologist at the University of Gothenburg in Sweden. “It’s scary, I’d say.”

August 12, 2024

Movement to limit CAFO pollution seen strengthened by Michigan court ruling

By Keith Schneider

A recent state court decision could transform how animal agriculture is regulated in Michigan, and potentially influence how other state and federal regulators oversee the industry’s mammoth waste stream, according to environmental lawyers and activists.

The optimism from environmental advocates comes after the Michigan Supreme Court ruled on July 31 that the state’s Department of Environment, Great Lakes, and Energy (EGLE) has full authority to require industrial animal agriculture to take much stronger actions to manage the torrent of manure waste polluting waterways. The closely watched case pit the administration of Michigan Gov. Gretchen Whitmer against the powerful agricultural industry, led by the Michigan Farm Bureau.

“The decision is extremely powerful language for EGLE to act,” said Carrie La Seur, the legal director of For Love of Water, an environmental law and policy group that intervened on behalf of the state. “It’s clear that EGLE gained a lot of authority through this ruling.”

Michigan is one of many US states contending with rampant ground and surface water pollution caused by agricultural production. A key source of the pollution are the nation’s more than 21,000 large dairy, cattle, hog, and poultry operations, known as Concentrated Animal Feeding Operations or CAFOs.

The nationwide problem extends across the ocean. On Aug 9, the Center for Food Safety environmental group gave legal notification to a Hawaii “megadairy” of their intention to file a lawsuit in federal court. The allege the dairy has been illegally “discharging animal waste, solid manure, liquid manure, milk waste, and chemical pollutants” into the state’s waterways and into the Pacific Ocean.

August 8, 2024

Peel those apples: New study confirms washing doesn’t remove pesticide residues

By Carey Gillam

A new scientific report lends weight to consumer concerns about pesticide residues on food, presenting fresh evidence that washing fruits before eating them does not remove various toxic chemicals commonly used in agriculture.

The paper, authored by Chinese researchers and published Wednesday in the American Chemical Society’s journal Nano Letters, comes amid ongoing debate over the extent of pesticide contamination of food, and the potential health risks associated with a steady diet that includes residues of weed killing chemicals, insecticides and other farm chemicals.

In May, Consumer Reports said it had determined that 20% of 59 different fruit and vegetable categories carried pesticide residues at levels that posed “significant risks” to consumers, based on an analysis of data gathered by the US Department of Agriculture (USDA).

The central point of the new paper is primarily to share the technical details of a process the authors developed allowing for enhanced trace detection of pesticides in foods. But the underlying finding about the ineffectiveness of washing fruit is important for consumers who may be relying on food safety practices that are insufficient, the authors said.

Traditional “fruit-cleaning operations cannot wholly remove pesticides,” the paper states.

When using the technique to examine an apple, for instance, the researchers said the “imaging results prove that the pesticides penetrate the peel layer into the pulp layer.”

Using the technology they developed, the authors said they found the pesticide contamination diminished when the apple peel was removed along with some of the pulp layer.

“This study, situated within the expansive realm of food safety, endeavors to furnish health guidance to consumers,” said Dongdong Ye, a professor with the School of Materials and Chemistry at Anhui Agricultural University and an author of the paper. “Rather than fostering undue apprehension, the research posits that peeling can effectively eliminate nearly all pesticide residues, contrasted with the frequently recommended practice of washing.”

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 11, 2024

Monsanto Roundup trial win overturned by Oregon court

By Carey Gillam

An Oregon appeals court on Wednesday overturned a trial victory by Monsanto owner Bayer AG in a decision that adds to an ongoing debate over the company’s efforts to create a nationwide legal and legislative shield from lawsuits alleging Roundup weed killer causes cancer.

The court found that the trial judge in the case improperly barred key evidence about the US Environmental Protection Agency (EPA) from being presented to the jury, which could have led the jury to find in favor of the plaintiff. And, notably, the court rejected arguments by the company that claims about the dangers of its products should be barred because those products carry the EPA’s stamp of approval.

Other courts have similarly rejected so-called “preemption” arguments by Bayer, which bought Monsanto in 2018. But after failing to get court backing, Bayer has been pushing state and federal lawmakers to give it and other pesticide makers the protection the courts have rejected. A proposed measure is being considered by lawmakers for inclusion in the US Farm Bill. Monsanto unsuccessfully argued to the appeals court that the case never should have even gone to a jury because the claims should have been preempted.

Bayer did not respond to a request for comment on the latest ruling.

Attorney Andrew Kirkendall, who represented the plaintiff in the case, said he welcomed the court’s decision and was eager to retry the case with the evidence about the EPA included.

The testimony that the trial judge refused to allow was to have come from Charles Benbrook, a former research professor who served at one time as executive director of the National Academy of Sciences board on agriculture. Benbrook has authored papers critical of the EPA’s handling of glyphosate herbicides, noting that the agency has given little weight to independent research regarding the actual products sold into the marketplace and used by millions of people around the world. Instead, the EPA has mostly relied on studies paid for by Monsanto and other companies selling glyphosate herbicides that found no cancer concerns.

“There is important new science to share with the jury that clarifies why and how Roundup can cause cancer,” Benbrook said this week after learning of the court ruling.

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 27, 2024

Rain-fed streams lacking federal protections are vital for water quality, study finds

By Shannon Kelleher

New data supports environmental advocates’ long-held position that small, rain-fed streams make major contributions to water quality in rivers and lakes across the US.

So-called “ephemeral streams,” which only flow after precipitation falls and are not currently protected under the Clean Water Act, contribute more than half of the water discharged from US regional rivers, according to the study, which published on Thursday in the journal Science. These streams are likely a major pathway for downstream water pollution, the study concluded.

The findings back concerns that a 2023 US Supreme Court decision in the case titled Sackett v. Environmental Protection Agency (EPA) may put many US waterways and communities living downstream at risk of exposure to pollutants. The ruling effectively removed federal protections for ephemeral streams and wetlands, narrowly defining “waters of the United States” as “relatively permanent, standing or continuously flowing bodies of water.”

The study provides “some scientific confirmation that pollution would flow significantly downstream from these smaller waterways,” said John Rumpler, clean water director and senior attorney for the organization Environment America.

“That’s a really important finding,” he said. “If polluters are allowed to dump into ephemeral streams with impunity and there’s no federal recourse, then downstream water quality can be dramatically impacted.”

The Supreme Court’s move to limit the Clean Water Act has been met with alarm by environmentalists and sharp criticism from the Biden administration, with President Joe Biden saying in a statement last May that it “upends the legal framework that has protected America’s waters for decades.”

A 2022 brief filed in the Supreme Court by 45 senators and 154 House members expressed support for more limited federal control in the Clean Water Act, siding with petitioners in the then-pending Sackett v. EPA case.

June 25, 2024

Baby bottle makers deceived parents over dangers of plastic products, lawsuits allege

Two US baby bottle makers have been engaging in a “campaign of reckless deceit” about the dangers microplastics in their products pose to infants and young children, according to a new lawsuits filed Tuesday.

In the separate court filings, lawyers representing a small group of California parents alleged that Philips North America and the Handi-Craft Co. marketed baby bottles and plastic cups as safe for children even though they knew that when the products were heated microplastics from the containers could leach into the food and liquids being served to the children. Parents often microwave or otherwise warm bottles of breast milk or formula before serving them to babies.

June 20, 2024

Postcard from California: The human cost of living with wildfires

By Bill Walker

The toll of wildfire in California is staggering: In the last 10 years, wildfires have burned more than 13.6 million acres of the state and taken the lives of 144 people, including 15 firefighters. The state estimates property damages from the more than 93,000 wildfires in those years at nearly $250 billion.

But sobering as those statistics are, they don’t measure the full cost to Californians from living with increasingly deadly and destructive wildfires.

A new study, led by researchers from the Fielding School of Public Health at the University of California at Los Angeles (UCLA), calculated that from 52,480 to 57,710 Californians died prematurely from exposure to wildfire smoke between 2008 and 2018. The study, published June 7 in the peer-reviewed journal Science Advances, estimated the economic impact of those lost lives at between $432 billion and $456 billion.

“Climate change, forest mismanagement and an expansion of the wildland-urban interface have led to worsening wildfires across California, and with those fires come smoke pollution and increasing health impacts from air pollution exposure,” Rachael Connolly, a staff researcher at the UCLA Fielding School and lead author of the study, said in a statement. “This is the first research exploring how that chronic, long-term smoke exposure affects people across the state.”

The wildland-urban interface refers to zones where people live near forests or other undeveloped areas at greater risk of wildfire. The high cost and scarcity of housing in coastal cities is pushing more and more Californians to move inland, swelling the population in areas more likely to burn.