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Dominik Hülse, an Earth system modeler based at University of California Riverside, worked on a November 2021 study that explored how ancient microbes may have prolonged the Permian extinction by producing a toxic gas. Here, Hülse poses with a finger to his nose to highlight the toxic “rotten egg” scent of hydrogen sulfide. (Image credit: … Read more
Scientists and policymakers are puzzling over how to get rid of a group of toxic chemicals found in streams and drinking water. One hope was that the persistent compounds, known as per- and polyfluoroalkyl substances (PFAS), would flow out to sea and stay put. But the ocean, it turns out, is spitting them back out: … Read more
Remnants of industrial chemicals in the air can potentially transform into new substances more toxic and persistent than the original pollution, according to a global study published on Wednesday. Using samples gathered around the world, the study published in Nature found that these previously unidentified products are present in the atmospheres of 18 big … Read more