In this Nov. 16, 2015 photo, employees work next to the gas lines of the Mississippi Power Co. carbon capture power plant in DeKalb, Miss. The construction costs for the plant have grown to about $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)
In this Nov. 16, 2015 photo, employees work next to the gas lines of the Mississippi Power Co. carbon capture power plant in DeKalb, Miss. The construction costs for the plant have grown to about $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) Rogelio V. Solis AP
In this Nov. 16, 2015 photo, employees work next to the gas lines of the Mississippi Power Co. carbon capture power plant in DeKalb, Miss. The construction costs for the plant have grown to about $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) Rogelio V. Solis AP