The U.S. Supreme Court overturned the doctrine of Chevron deference to federal agencies in interpreting statutes when issuing rules, ending 40 years of legal precedent.

A panel of legal experts said the Supreme Court decision in West Virginia v. EPA could place constraints on congressional efforts to address climate change.

The Supreme Court ruled that EPA lacks authority to compel generation shifting to reduce CO2 emissions, citing a lack of “clear congressional authorization.”