Constellation Energy to Green 2011 APA National Planning Conference With 50 Renewable Wind Energy Certificates

Constellation Energy (NYSE: CEG), a leading competitive electricity supplier, today announced it will match the estimated electricity usage of the American Planning Association’s (APA) 2011 National Planning Conference with 50 Green-e Energy certified renewable energy certificates (RECs) from wind facilities. The conference will be held April 9-12 at the Hynes Convention Center in Boston.

"We’re pleased to provide these renewable energy certificates in support of APA’s commitment to a greener environment and building a nation of vital communities,” said Michael Kagan, chief retail sales officer for Constellation Energy.

"Promoting the use of renewable energy sources is important in helping create sustainable places,” said W. Paul Farmer, FAICP, APA’s chief executive officer. "We are pleased to highlight the importance of green, renewable energy, which aligns with the planning profession’s comprehensive viewpoint for our nation’s communities.”

A REC represents the environmental benefits of electricity generated by wind, solar or other renewable power facilities. By matching the electricity used at APA’s National Planning Conference with RECs, Constellation avoids 55,943 pounds of carbon dioxide emissions, which is equivalent to the annual greenhouse gas emissions from five passenger vehicles.

More than 5,000 planning professionals are expected to attend APA’s National Planning Conference, which will honor innovative planning efforts and individuals. APA and its more than 40,000 members strive to create communities of lasting value that offer citizens more choices about where to live, work and recreate.

About the American Planning Association

The American Planning Association is an independent, not-for-profit educational organization that provides leadership in the development of vital communities. APA and its professional institute, the American Institute of Certified Planners, are dedicated to advancing the art, science and profession of good planning -- physical, economic and social -- so as to create communities that offer better choices for where and how people work and live. Members of APA help create communities of lasting value and encourage civic leaders, business interests and citizens to play a meaningful role in creating communities that enrich people's lives. APA has offices in Washington, D.C., and Chicago, Ill. For more information, visit www.planning.org.

About Constellation Energy

Constellation Energy (www.constellation.com) is a leading competitive supplier of power, natural gas and energy products and services for homes and businesses across the continental United States. It owns a diversified fleet of generating units, totaling approximately 12,000 megawatts of generating capacity, and is a leading advocate for clean, environmentally sustainable energy sources, such as solar power and nuclear energy. The company delivers electricity and natural gas through the Baltimore Gas and Electric Company (BGE), its regulated utility in Central Maryland. A FORTUNE 500 company headquartered in Baltimore, Constellation Energy had revenues of $14.3 billion in 2010.