WASHINGTON – In a new case about climate change, the U.S. Supreme Court will hear an appeal from electric utilities that are trying to short-circuit an effort by states to force cuts in power plant emissions.

The Court agreed yesterday to consider ending a federal lawsuit by eight states, New York City and others that accuse the power companies of being among the largest emitters of carbon dioxide in the world. The suit asks a federal judge to order reductions in the emissions in plants in 20 states.