Pic Walker, environmental advocate and sustainability consultant, will tell the story of the journey the world's largest retailer is on to make itself more sustainable. Beginning with gaining senior executive alignment and building a strategy from the grassroots to developing Sustainable Value Networks and driving implementation, Walker will highlight significant steps taken to shift the mindset of Wal-mart from obligation to opportunity. He will discuss the progress Wal-mart has made on its sustainability goals and barriers to meeting those goals. Looking into the future, as the journey continues to unfold, Walker will touch on Wal-mart's integration, expansion, and the implications for suppliers, customers, employees and -- someday soon, China.