Weighing Wal-Mart

Weighing Wal-Mart

Five years into its sustainability mission, the world's largest retailer is getting some respect

WHEN THE ENVIRONMENTAL Defense Fund set up an office in Wal-Mart's hometown of Bentonville, Ark., in 2007, staff members spent several hours each week answering the same question from donors: Why are we working with Wal-Mart?

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