Agency deference.

The U.S. Supreme Court has overturned its 1984 ruling known as the Chevron doctrine that allowed judges to defer to a federal agency's reading of an ambiguous law, The Washington Post reports.

The court said its decision won't affect prior rulings under the Chevron doctrine, such as deeming CO2 a Clean Air Act pollutant. It will affect agency actions going forward though.

Amena H. Saiyid

Washington D.C. Correspondent