Michigan v. Environmental Protection Agency

What’s the price of clean air? The Supreme Court found that the EPA, tasked with setting limits on hazardous pollutants, unreasonably declined to consider cost when regulating power plant emissions under the Clean Air Act. 42 U.S.C. § 7412 gives the EPA the authority to regulate power plants under the Clean Air Act as long as the Agency finds that “regulation is appropriate and necessary.” In the instant case, the EPA concluded that regulation met both these requirements. Finding the agency’s decision unreasonable, the majority struck down the EPA’s rule.

The minority, however, asserted that the decision was unsound; it overlooked the intent of Congress and will likely have costly repercussions.