PSE Joins Chicago Climate Exchange.

BELLEVUE, Wash. -- Washington-based Puget Sound Energy (PSE), a subsidiary of Puget Energy (NYSE:PSD), a Fortune 1000 company, has joined the Chicago Climate Exchange (CCX), the world's first, and North America's only, voluntary, legally binding greenhouse gas emissions reduction, registry and trading program.

PSE joins other energy companies, major corporations, professional firms, agricultural businesses, and local governments, including King County in Washington state, that, in becoming CCX members, agree to reduce emissions of greenhouse gases, believed to be a major contributor to global warming. PSE is Washington state's oldest and largest energy utility that serves more than 1 million electric customers and 700,000 natural gas customers in 11 counties, primarily in the Puget Sound region of western Washington.

PSE's agreement to work with CCX on greenhouse gas emissions is consistent with its commitment to reduce the impact of its energy production activities on the environment while meeting the energy demands of its growing customer base. PSE operates two wind generation facilities in Washington state and is in the process of developing the largest solar energy facility in the Pacific Northwest.

Information about PSE's renewable energy development and energy conservation efforts and its position on greenhouse gas can be found on the company's website, www.pse.com.

About Puget Sound Energy

Washington state's oldest and largest energy utility, with a 6,000-square-mile service territory stretching across 11 counties, Puget Sound Energy (PSE) serves more than 1 million electric customers and 700,000 natural gas customers primarily in the Puget Sound region of western Washington. PSE, a subsidiary of Puget Energy (NYSE:PSD), meets the energy needs of its growing customer base through incremental, cost-effective energy conservation, low-cost procurement of sustainable energy resources, and far-sighted investment in the energy-delivery infrastructure.

About Chicago Climate Exchange

CCX is North America's only, and the world's first, legally binding multi-sectoral, rule-based and integrated greenhouse gas emission registry, reduction and trading system. CCX members reflect a cross-section of major public and private sector North American entities, including Abitibi-Consolidated, Manitoba Hydro, Ford Motor, International Paper, IBM, DuPont, American Electric Power, cities such as Chicago, Oakland, California, Boulder, Colorado, Portland, Oregon, and the State of New Mexico, as well as non-industrial environmental innovators such as World Resources Institute, and the Rocky Mountain Institute. CCX now has members globally, including Beijing Shenwu Thermal Company, a leading Chinese provider of energy reduction technologies. Emissions reductions achieved through the CCX market are significant in scale and impact. CCX Members gain practical experience by building an efficient emissions management and monitoring system, while also acquiring cutting-edge measurement and trading skills that will be needed in the short and long term as the world comes to terms with the climate change challenge. European Climate Exchange (ECX), a wholly owned subsidiary of CCX, manages the sales and marketing for ECX Carbon Financial Instruments (ECX CFI contracts) in the European Union Emissions Trading Scheme system. The Chairman and CEO of CCX is economist and financial innovator Dr. Richard L. Sandor, who was named a Hero of the Planet by Time magazine for his work in founding CCX, as well as one of the Top 100 Influential persons in finance by Treasury and Risk Management magazine. For more information, please visit www.chicagoclimateexchange.com.