AG ​Weiser filed a petition with the U.S. Court of Appeals for the Tenth Circuit in Denver challenging the Trump administration’s disapproval of Colorado’s regional haze plan to reduce air pollution and improve air quality in some of the region’s most cherished natural areas.

“EPA’s decision to disapprove Colorado’s regional haze state implementation plan is based on policy objections to closing coal plants and it is another example of the Trump administration intruding on state authority without any basis in law. Colorado included the closure of several coal-fired power plants in its plan based on utilities’ independent decisions to close them. Those decisions in turn were based on the utilities’ judgment that closure was the best and most cost-effective way to comply with a range of state and federal laws." – AG Weiser