A new study published in Environmental Research Letters and co-authored by Charles T. Driscoll, University Professor of Environmental Systems and Distinguished Professor of Civil and Environmental Engineering in the College of Engineering and Computer Science, predicts that the Trump administration’s Affordable Clean Energy (ACE) rule, which aims to reduce carbon dioxide emissions at coal-fired power plants, will lead to an increase in emissions at 28 percent of coal plants in 18 states plus Washington, D.C.