Here is the opinion in Michigan v. EPA (Michigan v. EPA Opinion). Judge Wood’s opinion begins:

The cultural and religious traditions of the Forest County Potawatomi Community (“the Community”) often require the use of pure natural resources derived from a clean environment. Many years ago, the Community became alarmed by increasing pollution levels in its lakes, wetlands, and forests. To remedy this problem, it submitted a request to the Environmental Protection Agency (“EPA”) to redesignate certain tribal lands from Class II to Class I status under the Prevention of Significant Deterioration (“PSD”) program of the Clean Air Act (“the Act”). This would have the effect of imposing stricter air quality controls on emitting sources in and around the Community’s redesignated lands.

After nearly fifteen years of administrative proceedings and dispute resolution efforts between the Community and neighboring Wisconsin (which were successful) and Michigan (which were not), the EPA promulgated a final ruling redesignating the Community’s lands to Class I status. It also issued two companion announcements concluding dispute resolution proceedings with Wisconsin and Michigan. Michigan seeks review of these three final administrative rulings. It asserts that the EPA pursued the redesignation in an improper manner and, as a result, needlessly complicated Michigan’s air quality control programs. Because Michigan lacks standing to pursue these claims, we dismiss its petition for review.

Briefs are here.