PHOENIX (AP) -- Arizona is challenging a federal decision that requires three coal-fired power plants to upgrade pollution controls.
The Arizona Attorney General's Office asked a federal appeals court Thursday to review the decision from the U.S. Environmental Protection Agency.
The EPA partially approved Arizona air quality plan for the Cholla, Coronado and Apache generating stations. But the agency said the state didn't do enough to limit nitrogen oxide emissions.
The EPA came up with new limits for most of the units and gave the plants' operators five years to comply.
State Department of Environmental Quality Director Henry Darwin says Arizona should be making decisions about what's in the best interest of the state, not the EPA.
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