Industry groups said the E.P.A. had exceeded its authority in requiring the drinking-water cleanup. The chemicals, known as PFAS, are linked to cancer and health risks.

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At an industry presentation about dangerous “forever chemicals,” lawyers predicted a wave of lawsuits that could dwarf asbestos litigation, audio from the event revealed.

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Asbestos, “forever” chemicals, E.V.s and endangered species. Here’s what 10 new rules cover, and why the administration has been churning them out.

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