Wal-Mart recently announced that it will reduce plastic-bag waste by one-third in five years, which it says will keep 9.5 billion plastic shopping bags out of the waste stream. Impressive numbers, but consultant Andrew Winston wonders if it wouldn't make more sense for Wal-Mart to do something massive. IKEA, he notes, cut bag use by 90% in several countries by charging for its bags. "It seems possible that going for a much larger change ... may actually save a ton of money and effort," he says.
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