Supreme Court will hear challenge to EPA's 'good neighbor' rule that limits pollution

The U.S. Supreme Court will hear a challenge from GOP-led states and industry groups seeking to block the EPA's "good neighbor" provision, which is designed to reduce smog and air pollution. (Catie Dull/NPR)

The U.S. Supreme Court will hear arguments Wednesday in an important environmental case that centers on the obligation to be a "good neighbor."

Lawyers representing three states, companies and industry groups will ask the justices to block a federal rule that's intended to limit ozone air pollution. Experts said it's only the third time in more than 50 years that the court has scheduled arguments on an emergency application like this one.