Air Emissions
| 2005 | 2006 | 2007 | |
| U.S. Sulfur Dioxide Emissions (Tons)* | |||
| 844,500 | 812,600 | 684,000 | |
| U.S. Nitrogen Oxides Emissions (Tons)* | |||
| 160,400 | 148,600 | 131,000 | |
*SO2 and NOx reported from U.S. electric generation based on Dec. 31, 2007 ownership share of stations. Combustion turbines not equipped with continuous emission monitors and facilities operated or owned by Duke Energy Generation Services are not included.
