EPA Finalizes Extended Deadlines for National Parks Haze Rule

States now have a longer runway to submit plans to reduce pollutants that cause haze buildup in national parks, according to a rule finalized Tuesday.

The Clean Air Act requires states to submit State Implementation Plans, or SIPs, that lay out proposals to reduce air emissions that contribute to visibility-reducing haze. Those plans are then approved or disapproved by the EPA, which must then come up with a federal plan if a SIP doesn’t meet requirements.

The final rule extends the deadlines for SIPs under the Regional Haze Rule’s third planning ...