EPA Approves Sun Microsystems Aggressive Greenhouse Gas Emissions Goal

Sun Continues Progress Towards Emissions Goal, Furthers its Commitment to Eco-Responsibility

SANTA CLARA, CALIF . -- January 23, 2006 -- Sun Microsystems, Inc. (NASDAQ: SUNW) today announced that the EPA has approved its pledge to reduce the company’s total U.S. greenhouse gas (GHG) emissions by 20 percent by 2012. Sun has committed to the reduction goal as part of the U.S. Environmental Protection Agency’s (EPA’s) Climate Leaders program, which Sun is a member.

Launched in 2002, Climate Leaders is an industry-government partnership that works with companies to develop long-term comprehensive climate change strategies. Climate Leaders partners set a corporate-wide greenhouse gas reduction goal and then inventory their emissions to measure progress. By reporting inventory data to the EPA, partners create a lasting record of their accomplishments. Partners also identify themselves as corporate environmental leaders and strategically position themselves as climate change policy continues to unfold.

“Our commitment to reducing GHG emissions through the Climate Leaders program is a strategic business decision that demonstrates Sun’s continued commitment to eco-responsibility and improving the efficiency of our operations,” said David Raduziner, senior director of workplace resources at Sun Microsystems.

Today’s announcement also builds upon Sun’s continued effort to address global environmental concerns by delivering innovative and “eco-responsible” products to market, assisting customers in addressing energy and environmental issues. As a technology-driven company, Sun’s prime contribution to eco-responsibility is centered on innovation which not only benefits customer’s business, but also helps to benefit the environment, including improving energy efficiency, choosing less harmful materials, and encouraging reuse and recycling.

“Sun is committed to not only bringing environmentally responsible products to market, but also to ensuring that we are environmentally accountable as well,” said Raduziner. “We are proud of the fact that for over a decade we have been encouraging Sun employees to participate in our location-independent work program, which on average saves them two hours a week in commute time, easing air pollution and gas needs.”

Examples of Sun’s recent environmental leadership span its notable product-lines as well as internal programs, including the company’s award-winning Sun iWork Strategy, a remote worker enablement program for employees. The program provides Sun employees with commute and remote work alternatives so they spend less time in the car, lessening the impact of fossil fuels on the environment. The program was recently named as one of the top five programs of its kind in the EPA’s annual selection of The Best Workplaces for Commuters. The effort has been so successful that Sun has developed the Sun OpenWork Practice to help customers develop flexible work options for their own employees.

Additionally, Sun announced the UltraSPARC T1 processor in November 2005, the first processor designed for eco-responsibility - with breakthrough innovations in power, cooling, and performance, further demonstrating its commitment to putting innovation to work for the environment.

“By setting an aggressive greenhouse gas emissions reduction goal, Sun has taken a leadership position in the technology industry to improve the environment,” said Kathleen Hogan, director of EPA’s Climate Protection Partnerships Division.

The company is active in other environmental stewardship programs including the CEO Business Roundtable S.E.E. Change Initiative, ICT & Sustainability Forum and Sustainable Silicon Valley, in addition to the Climate Leaders program Sun is also a sponsor of the EPA’s upcoming conference, “Global Conference on Energy Efficiency in the Data Center,” where end users, IT leaders and EPA representatives will discuss solutions to address energy consumption in global data center facilities. The conference will take place on 1/31 at Sun’s Santa Clara Conference Facility.

For more information on the upcoming Sun-sponsored EPA Conference, visit: www.energystar.gov/index.cfm?c=products.pr_esads_conf

For more information on Sun’s Eco-Responsibility products, visit: http://www.sun.com/aboutsun/environment/promotions.jsp

For more information about Climate Leaders, visit http://www.epa.gov/climateleaders.

About Sun Microsystems, Inc.

A singular vision -- “The Network Is The Computer” -- guides Sun in the development of technologies that power the world’s most important markets. Sun’s philosophy of sharing innovation and building communities is at the forefront of the next wave of computing: the Participation Age. Sun can be found in more than 100 countries and on the Web at http://sun.com.

Sun, Sun Microsystems, the Sun logo, Solaris, Java, and The Network Is The Computer are trademarks or registered trademarks of Sun Microsystems, Inc. in the United States and other countries.

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Stephanie Hess

Sun Microsystems, Inc.

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