Americans could be paying nearly $6 billion extra a year in energy bills if the Trump administration continues to keep power plants operating past their retirement dates, according to a new report.By Carrie KleinIn May, the U.S. Department of Energy ordered Michigan’s Campbell coal plant to stay open, despite its plans to shut down after more than 60 years of operation. A week later, DOE ordered the Eddystone oil and gas plant in Pennsylvania to do the same. The reason, according to the Trump administration, was an inadequate energy supply—a claim that some energy experts dispute.