This Nov. 16, 2015 photo shows the orange-painted gas lines of the Mississippi Power Co. carbon capture power plant in DeKalb, Miss. The construction costs for the plant have grown to $6.4 billion and it has been repeatedly delayed, but Southern Company, owners of Mississippi Power stand by the plant as a model for burning coal while emitting less carbon dioxide and hope to market its key technology. (AP Photo/Rogelio V. Solis)