By Michael Barbaro Published: April 16, 2007 After battling over prices for decades, so-called big-box retail chains in the United States are set to fight it out in a new arena: the environment. Home Depot will introduce a line of 3,000 products, like fluorescent light bulbs and natural insect killers, that promote clean water and energy conservation. The product line – expected to reach 6,000 products by 2009, or 12 percent of the chain’s total – would become the largest “green” labeling program in American retailing and could persuade competitors to speed up similar plans. Click here to read the entire article …..