Seattle, Washington, USA, 06 October 2008 -- Plum Creek Timber Co. Inc. (NYSE: PCL) today announced that Dow Jones has named the company to its Dow Jones Sustainability World Index (DJSI World). The DJSI World comprises more than 300 of the leading sustainability companies out of the biggest 2500 companies worldwide. The Dow Jones Sustainability Indexes are the first global indexes tracking the financial performance of the leading sustainability-driven companies worldwide.

The DSJI World captures the top 10% of companies based on long-term economic, environmental, and social criteria. The underlying research evaluates corporations based on a variety of criteria including climate change strategies, energy consumption, human resources development, knowledge management, stakeholder relations, and corporate governance.

“At Plum Creek, we believe that our efforts to be socially and environmentally responsible contribute to our overall business success, and we are pleased that Dow Jones Sustainability World Index has recognized the company’s ongoing efforts in this regard,” said Rick Holley, Plum Creek’s president and chief executive officer.

“Plum Creek has long conducted its business with a strong commitment to sustainability,” Holley continued. “In 1999, Plum Creek was the first company to have all of its lands third-party certified by PricewaterhouseCoopers to the standards of the Sustainable Forestry Initiative. Today, Plum Creek continues this commitment and is looking forward to helping resolve global sustainability concerns by working on carbon sequestration initiatives and researching emerging alternative energy sources such as biofuels.”

Plum Creek is the largest and most geographically diverse private landowner in the nation with approximately 8 million acres of timberlands in major timber producing regions of the United States and 10 wood products manufacturing facilities in the Northwest.

The Dow Jones Sustainability Indexes track the financial performance of the leading sustainability-driven companies worldwide. Based on the cooperation Dow Jones Indexes, STOXX Limited, and SAM Group, the indexes provide asset managers with reliable and objective benchmarks to manage sustainability portfolios. The indexes cover companies in terms of economic, environmental, and social criteria. Full details about the design philosophy, review methodology, and index components are available at www.sustainability-indexes.com.