A federal court has ruled that the Energy Department overstepped its authority by forcing a coal-fired power plant to remain open. The plant, which is 64 years old, had been scheduled to retire last year. Energy officials had argued that keeping the plant open was necessary for reliable electricity in the region.

The court's decision was in response to a lawsuit filed by environmental groups and three states. The states involved in the lawsuit were Michigan, Illinois, and Minnesota.

Further details about the court's ruling and its implications are available from the source.