From The Greening of Wal-Mart Shoppers: “The world’s largest retailer is launching a Live Better Index to track customers’ purchases of five eco-friendly products: compact fluorescent light bulbs, organic milk, concentrated/reduced-packaging liquid laundry detergents, extended-life paper products and organic baby food. The idea is that the index will gauge Wal-Mart’s 180 million customers’ attitudes toward [...]