The Hill reports that U.S. Court of Appeals for the District Columbia on Friday rejected industry challenges to a 2016 U.S. Occupational Safety and Health Administration (OSHA) rule aimed at protecting U.S. workers from exposure to silica.

The rule, issued by the Obama administration, was designed to protect workers in the maritime and construction industries, who are frequently exposed to silica dust. The rule had been in the works for years, but was repeatedly delayed by opposition from industry groups.

Business groups including the U.S. Chamber of Commerce sued over the rule, questioning whether there was enough evidence support the claim that limiting the worker’s exposure to the chemical would reduce health risks, among other things.

“We reject all of Industry’s challenges,” the court wrote.

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