Business Green: Wal-Mart’s new incoming president and chief executive, Mike Duke, last week insisted he was “very, very committed” to the sustainability strategy launched by his predecessor Lee Scott back in 2005, adding that he would seek to ” accelerate” and “broaden” the company’s green initiatives when he takes over the reins of the world’s largest retailer. Speaking alongside Scott at the company’s 2009 Sustainability Milestone Meeting, Duke said that the company would continue to work towards …