Environment ❯ Air Quality

Emissions Control

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EPA Proposes Narrow Rollback of Biden-Era Heavy‑Duty Truck NOx Rule

Proposing cuts to warranty and enforcement rules to lower truck costs, the EPA kept numerical NOx limits as the rule opened for public comment.

Trump Orders EPA to Ease Rules on Vehicle Emissions Repairs

California Unveils Plan to Backstop EV Push After Federal Rollbacks

Illinois Launches South Side Mobile Emissions Testing Pilot in Chicago

Truckmakers File Suit in California as FTC Declares Emissions Pact Unenforceable

Supreme Court Grants Fuel Producers Right to Sue Over California Emissions