How the Index WorksFor example, Walmart's computer buyer used the Sustainability Index and The Sustainability Consortium's (TSC) research tools to identify opportunities to reduce greenhouse gas emissions and save energy from laptops. Only 30 percent of laptops sold at Walmart were using "advanced power management" – a feature that switches the computer to a lower power state when it's idle or used at a reduced energy capacity. The industry had a standard for activating "sleep" mode when a computer's system is in 30 minutes of inactivity. Walmart's computer buyer asked suppliers, when possible, to shorten the time to 10 minutes of inactivity. Walmart now has a goal for 100 percent of the computers it sells this holiday season to have advanced power management as the default setting. This change will eliminate more than 200,000 tons of greenhouse gas emissions and save customers money on electricity bills.Learn more about Walmart's commitment to sustainability at The Green Room or on our website and follow us on Twitter ( @WalmartGreen) to get updates about sustainability efforts and milestones. For additional information about The Sustainability Consortium, please visit TSC's website. About WalmartWal-Mart Stores, Inc. (NYSE: WMT) helps people around the world save money and live better – anytime and anywhere – in retail stores, online, and through their mobile devices. Each week, more than 200 million customers and members visit our 10,300 stores under 69 banners in 27 countries and e-commerce websites in 10 countries. With fiscal year 2012 sales of approximately $444 billion, Walmart employs more than 2 million associates worldwide. Walmart continues to be a leader in sustainability, corporate philanthropy and employment opportunity. Additional information about Walmart can be found by visiting http://corporate.walmart.com, on Facebook at http://facebook.com/walmart and on Twitter at http://twitter.com/walmartnewsroom. Online merchandise sales are available at http://www.walmart.com and http://www.samsclub.com. About Walmart FoundationWalmart and the Walmart Foundation are proud to support initiatives that are helping people live better around the globe. In May 2010, Walmart and its Foundation made a historic pledge of $2 billion through 2015 to fight hunger in the United States. The Walmart Foundation also supports education, workforce development, environmental sustainability, and health and wellness initiatives. To learn more, visit http://foundation.walmart.com. SOURCE Wal-Mart Stores, Inc.