They will always be polarizing, but the New York Times has a great article about the greening of Wal-Mart, covering a lot of ground - early shareholder pressures, labor practices, CFL sales, and one of the ways their sustainability plan changed the packaging industry:
“By selling only concentrated liquid laundry detergent, an effort it began last year, Wal-Mart says, its customers will save more than 400 million gallons of water, 95 million pounds of plastic resin, 125 million pounds of cardboard and 520,000 gallons of diesel fuel over three years.”

