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Slashdot: Toxic 'Forever Chemicals' Contaminate Indoor Air at Worrying Levels, Study Finds

Toxic 'Forever Chemicals' Contaminate Indoor Air at Worrying Levels, Study Finds
Published on August 31, 2021 at 10:19PM
Toxic PFAS compounds are contaminating the air inside homes, classrooms and stores at alarming levels, a new study has found. From a report: Researchers with the University of Rhode Island and Green Science Policy Institute tested indoor air at 20 sites and detected the "forever chemicals" in 17 locations. The airborne compounds are thought to break off of PFAS-treated products such as carpeting and clothing and attach to dust or freely float through the indoor environment. Experts previously considered food and water to be the two main routes by which humans are exposed to PFAS, but the study's authors note that many humans spend about 90% of their time indoors, and the findings suggest that breathing in the chemicals probably represents a third significant exposure route. "It's an underestimated and potentially important source of exposure to PFAS," said Tom Bruton, a co-author and senior scientist at Green Science. PFAS, or per- and polyfluoroalkyl substances, are a class of about 9,000 compounds used to make products water-, stain- or heat-resistant. Because they are so effective, the chemicals are used across dozens of industries and are in thousands of everyday consumer products such as stain guards, carpeting and shoes. Textile manufacturers use them to produce waterproof clothing, and they are used in floor waxes, nonstick cookware, food packaging, cosmetics, firefighting foam and much more. PFAS are dubbed "forever chemicals" because they do not naturally break down. They accumulate in animals, including humans, and are linked to cancer, birth defects, liver disease, thyroid disease, decreased immunity, hormone disruption and a range of other serious health problems. A February Guardian analysis of household products found fluorine, an indicator of PFAS, present in 15 items. The chemicals are so widely used that it is difficult to say with precision where all the airborne PFAS are coming from, though the new study also detected their presence in carpets and clothing at some sites.

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