Supreme Court hears far-reaching case on the environment.

For the last five years, the Supreme Court has issued a series of rulings chipping away at federal power over states, using the general principle that the commerce clause does not apply to noneconomic activity inside a state's borders. The Illinois case concerns a group of local governments that want to build a landfill on about 17 acres of wetlands near Chicago. The Army Corps of Engineers said no, because the land is sometimes used as a stopover for protected migratory birds.