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Air Quality Standards

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Appeals Court Blocks Trump EPA Effort to Abandon 2024 Soot Standard

The decision leaves the stricter 9 µg/m3 annual limit in place and forces the EPA to review how to implement the rule

State Fines Green Asphalt and Orders Stack Raised by December After Odor Outcry

U.S. Steel Points to Valve Failure in Fatal Clairton Coke Works Blast