Alliant Energy named “Distribution Partner of the Year” by Environmental Protection Agency

Natural Gas STAR Program gives award for voluntary reduction in methane emissions

Alliant Energy Corporation (NYSE: LNT) has been recognized by the United States Environmental Protection Agency (EPA) for its voluntary efforts to reduce methane under the EPA’s Natural Gas STAR Program. Last week, Alliant Energy was named the 2007 “Distribution Partner of the Year” under the Program, at the EPA’s Natural Gas STAR Implementation Workshop in Houston. Methane is a major greenhouse gas and Alliant Energy has taken strong action to reduce greenhouse gas emissions.

“Alliant Energy is committed to reducing methane emissions from all our facilities as we continue to strive toward a cleaner energy future,” said Bill Harvey-Chairman and CEO for Alliant Energy. “This award from the EPA highlights our diligent and continual efforts to reduce methane emissions and we are proud to receive it.”

The Natural Gas STAR Program is a flexible, voluntary partnership between EPA and the oil and natural gas industry. Under the program, EPA works with companies that produce, process, transmit, and distribute natural gas to identify and implement cost-effective reductions in methane, a gas over 20 times more potent than carbon dioxide at trapping heat in the atmosphere. The Natural Gas STAR Program has over 120 partner companies, including eight international partners, and nearly 20 major industry trade-association sponsors.