Steam billows from a smokestack of Duke Energy’s Allen power plant in Belmont.
Steam billows from a smokestack of Duke Energy’s Allen power plant in Belmont. JOHN D. SIMMONS jsimmons@charlotteobserver.com
Steam billows from a smokestack of Duke Energy’s Allen power plant in Belmont. JOHN D. SIMMONS jsimmons@charlotteobserver.com

Duke Energy settles federal air case for $5.4 million

September 10, 2015 12:28 PM