North Carolina v. Environmental Protection Agency, 531 F.3d 896 (D.C. Cir. 2008)

(EPA exceeded its authority to create Clean Air Act Interstate Rule, which included a cap and trade program to purportedly to reduce emissions of sulfur dioxide and nitrogen oxide from power plants in 28 states and D.C.; EPA cannot base emission caps on number of coal, oil and gas-fired electric power plants a state has compared to other states; court stated that EPA’s plan “beyond salvageable”).