BALTIMORE, Oct. 16 -- Constellation Energy announced that its subsidiary, Constellation NewEnergy, has entered into a purchase agreement for renewable energy with HMSHost Corporation, a world leader in travel dining and shopping. HMSHost Corporation develops and operates customized travel plazas along the Eastern Seaboard.

As part of the agreement, Constellation NewEnergy will secure approximately six million kilowatt hours of Green-e certified Renewable Energy Credits (RECs) to match 50 percent of the electricity used at the company's three travel plazas located along Interstate 95 in Delaware and Maryland. A combined 13.5 million customers visit the Chesapeake, Maryland and Delaware House plazas annually. The RECs will directly support the operation of clean, renewable wind generation; helping avoid the carbon emissions produced from the combustion of fossil fuels.

"Greening our travel plazas is a natural fit with our core commitments to customer comfort and safety," said Michael Jones, senior vice president, HMSHost. "Working with Constellation NewEnergy to match half of our electricity use at these locations complements our existing efforts to integrate green construction standards and energy efficient management systems into our building designs and operations."

Including the Delaware and Maryland locations, HMSHost operates more than 100 travel plazas on fourteen of the most heavily traveled motorways in the United States and Canada. The company is committed to creating customized world-class facilities that are an inviting experience for motorists who take a break from driving to enjoy a meal or linger in a retail shop.

"We are pleased to support HMSHost's sustainable environmental practices," said Carrie Cullen Hitt, vice president for Renewable Products for Constellation NewEnergy. "HMSHost's environmental leadership in their travel plaza operations is indicative of a corporate-wide commitment to enhance their customer's travel experience. It sets a powerful example for both the retail and travel industries."

HMSHost Corporation is world-renowned for creating innovative restaurants and shops in travel venues. The company has won international recognition for its original concepts, creative store designs, and outstanding customer service. HMSHost operates in more than 100 motorway travel plazas throughout North America. A wholly owned subsidiary of Autogrill S.p.A, HMSHost and the Autogrill Group are recognized leaders in travel amenities. With sales exceeding euros 3.9 billion, Autogrill is present in 32 countries with more than 4,800 points of sale in over 1050 locations (including 138 airports and 645 motorways) where 50,000 employees serve over 840 million customers every year.

Constellation NewEnergy, a wholly owned subsidiary of Constellation Energy (NYSE: CEG), is a leading competitive supplier of electricity, natural gas and energy-related services to commercial, industrial and institutional customers throughout North America. Constellation NewEnergy operates in all competitive energy markets throughout Canada and the United States, providing products that enable customers to effectively manage and control energy costs. Constellation NewEnergy's regional expertise, coupled with its national presence, provides customers with customized energy products and services while leveraging the assets of one of the strongest integrated energy companies in North America. Constellation NewEnergy, based in Baltimore, serves more than 19,000 commercial, industrial and institutional customers throughout 31 states and three Canadian provinces representing nearly 14,000 megawatts of peak load and more than 354 billion cubic feet of annual natural gas consumption.

Constellation Energy, a FORTUNE 200 company with 2006 revenues of $19.3 billion, is the nation's largest competitive supplier of electricity to large commercial and industrial customers and the nation's largest wholesale power seller. Constellation Energy also manages fuels and energy services on behalf of energy intensive industries and utilities. It owns a diversified fleet of 78 generating units located throughout the United States, totaling approximately 8,700 megawatts of generating capacity. The company delivers electricity and natural gas through the Baltimore Gas and Electric Company (BGE), its regulated utility in Central Maryland.