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Weedkiller Ingredient Widely Used In US Can Damage Organs and Gut Bacteria, Research Shows

Slashdot.org - Tue, 07/08/2025 - 08:00
An anonymous reader quotes a report from The Guardian: The herbicide ingredient used to replace glyphosate in Roundup and other weedkiller products can kill gut bacteria and damage organs in multiple ways, new research shows. The ingredient, diquat, is widely employed in the US as a weedkiller in vineyards and orchards, and is increasingly sprayed elsewhere as the use of controversial herbicide substances such as glyphosate and paraquat drops in the US. But the new piece of data suggests diquat is more toxic than glyphosate, and the substance is banned over its risks in the UK, EU, China and many other countries. Still, the EPA has resisted calls for a ban, and Roundup formulas with the ingredient hit the shelves last year. [...] Diquat is also thought to be a neurotoxin, carcinogen and linked to Parkinson's disease. An October analysis of EPA data by the Friends of the Earth non-profit found it is about 200 times more toxic than glyphosate in terms of chronic exposure. [...] The new review of scientific literature in part focuses on the multiple ways in which diquat damages organs and gut bacteria, including by reducing the level of proteins that are key pieces of the gut lining. The weakening can allow toxins and pathogens to move from the stomach into the bloodstream, and trigger inflammation in the intestines and throughout the body. Meanwhile, diquat can inhibit the production of beneficial bacteria that maintain the gut lining. Damage to the lining also inhibits the absorption of nutrients and energy metabolism, the authors said. The research further scrutinizes how the substance harms the kidneys, lungs and liver. Diquat "causes irreversible structural and functional damage to the kidneys" because it can destroy kidney cells' membranes and interfere with cell signals. The effects on the liver are similar, and the ingredient causes the production of proteins that inflame the organ. Meanwhile, it seems to attack the lungs by triggering inflammation that damages the organ's tissue. More broadly, the inflammation caused by diquat may cause multiple organ dysfunction syndrome, a scenario in which organ systems begin to fail. The authors note that many of the studies are on rodents and more research on low, long-term exposure is needed. The report notes that the EPA is not reviewing the chemical, "and even non-profits that push for tighter pesticide regulations have largely focused their attention elsewhere." "[T]hat was in part because U.S. pesticide regulations are so weak that advocates are tied up with battles over ingredients like glyphosate, paraquat and chlorpyrifos -- substances that are banned elsewhere but still widely used here. Diquat is 'overshadowed' by those ingredients."

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Arizona Brings a Huge Grid Battery Online Ahead of Peak Demand

Slashdot.org - Tue, 07/08/2025 - 05:00
Arizona has activated one of its largest grid battery storage projects to help meet peak summer energy demand. Electrek reports: Recurrent Energy, a subsidiary of Canadian Solar, just brought its 1,200 MWh Papago Storage facility in Maricopa County into commercial operation. The big grid battery is now supplying stored electricity to Arizona Public Service (APS), the state's largest utility, in time for peak air-conditioning season. Papago is the first of three Recurrent projects with APS. Together, they'll provide 1,800 MWh of storage and 150 MW of solar power. That's enough to run about 72,000 homes for four hours and provide year-round solar for another 24,000 homes.

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