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Unregulated flame retardants can break down into toxic byproducts, study shows
By Douglas Main
New research shows that two unregulated and widely used flame retardants found in many electronic devices and touted by industry as non-toxic break down into harmful molecules that can pose a health risk to fish and potentially other creatures, including humans.
The chemicals in question, large molecules called polymers, have largely escaped regulation as industry has argued that the materials are unlikely to degrade or make their way into living creatures. Many are even marketed as non-hazardous or environmentally friendly.
But a study published Monday in the journal Nature Sustainability found evidence suggesting that is not true. Researchers reported finding dozens of smaller molecules caused by the breakdown of polymeric flame retardants in soil, dust, and air outside electronic waste recycling facilities in southern China. The scientists exposed zebrafish — commonly used in initial toxicity tests — to the chemicals and found that they caused metabolic dysfunction and showed the potential for development harm.
“Our study suggests polymers can act as a trojan horse for toxic chemicals,” Da Chen, senior author and scientist at Jinan University in China. “They are added to products as inert large molecules, but over time they can degrade, exposing us to their harmful breakdown products.”
In recent years, polymeric flame retardants have been used to replace smaller, toxic molecules, such as chemicals called HBCD and PBDE, which have been partially phased out due to safety concerns.
Most polymers, including all such flame retardants, are considered exempt from major regulations meant to protect humans. But the new research shows regulation is needed, said Arlene Blum, co-author of the study and a research associate at the University of California, Berkeley. Blum also serves as executive director of the Green Science Policy Institute.
Over-planting of GM corn costing farmers billions, study finds
By Douglas Main
A new study adds to evidence that farmers in the US corn belt have over-planted a type of genetically modified (GM) corn, leading to estimated losses of more than $1 billion as the pests the corn was designed to repel have grown resistant over time.
The authors of the paper, published Thursday in the journal Science, said their findings supported a move toward a “more diversified” seed supply.
Known as Bt corn because it contains up to five toxins produced by a bacterium called Bacillus thuringiensis, the specialty corn is designed to express proteins that make the plant toxic to certain pests, including corn rootworm. More than 85% of corn planted in the US is the Bt variety, to which various insect pests are becoming resistant.
After examining rootworm crop damage data from 10 states over the period 2005-2016, the researchers determined that many farmers planted more GM corn than was considered necessary to address pest problems. Bt seeds typically carry a significant price premium.
The scientists found that planting Bt corn in certain eastern Corn Belt states provided “only marginal yield protection benefits,” benefits that appear to often be eclipsed by the higher costs for GM seed versus non-GM seed.
House hearing probes Biden climate spending as Zeldin threatens clawback
By Shannon Kelleher
A Republican-led House committee on Wednesday held a hearing that scrutinized the Biden administration’s spending on energy and environmental projects, amid concerns about possible conflicts of interest and the fast pace of funds appropriated in the former president’s final months in office.
“Our concern is when you have such a large volume of money getting out the door with such tight statutory deadlines, what processes and internal controls were in place for that money going out?” Nicole Murley, Acting Inspector General for the US Environmental Protection Agency (EPA), said in the Feb. 26 House Committee on Energy and Commerce hearing. “That’s always what we would call a ‘situation of risk.’”
Democrats blasted the hearing as “out of touch,” saying the real problems at hand are conflicts of interest within the Trump administration and moves to freeze federal funding and fire large numbers of government employees, including the Inspectors General of both the EPA and the US Department of Energy (DOE).
“With all the fires and chaos that Trump and Musk are intentionally starting in these agencies, it’s ridiculous that this is what Republicans are choosing to conduct oversight on today,” said US Rep. Frank Pallone, a Democrat from New Jersey. “This hearing is not about oversight or accountability. Instead, it’s another effort by Republicans to justify stealing investments from American communities in order to pay for tax cuts for billionaires and big corporations.”
The EPA and DOE each received billions of dollars through the Infrastructure Investment and Jobs Act (IIJA), which was signed in 2021, and the Inflation Reduction Act (IRA), which was signed in 2022. Funding made available through the laws has been appropriated for a wide range of projects, including clean energy grants, drinking water and wastewater infrastructure projects, environmental cleanup programs, clean school buses, and programs to reduce air pollution.
New data show widespread chemical contamination of drinking water
By Douglas Main
A newly released trove of data reveals widespread pollution of US tap water with more than 320 chemical contaminants, including industrial chemicals and farm-related pollutants.
The latest information is part of a tap water database, created by the Environmental Working Group (EWG), and incorporates information from nearly 50,000 water systems collected between 2021 and 2023.
Though few chemicals were found exceeding the federal government’s legally mandated maximum contaminant level (or MCL), almost all US water systems nation-wide contained at least one contaminant at levels that surpassed the health guidelines developed by EWG that are based on scientific research of the harms associated with the various contaminants.
“This is a wake-up call,” said Tasha Stoiber, an EWG senior scientist. “Outdated federal regulations continue to leave millions of people at risk of exposure to harmful substances.”
Among the chemicals commonly detected were per- and polyfluoroalkyl substances (PFAS), also known as forever chemicals, which were found in the water of at least 143 million Americans. Nitrates, a common waste product from farming operations linked to colorectal cancer and thyroid disease, were also commonly detected as well as disinfection byproducts caused by using chlorine.
Many of these disinfection byproducts — including chemicals called trihalomethanes, chloroform, haloacetic acids, and more — showed up in tens of thousands of water systems at concentrations far above what many health scientists consider safe.