wal-mart food

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An estimated $165 billion in food is wasted in the US each year, according to the research.

Wal-Mart's good food options now "Great For You," chain claims.

The stock plunged after Bloomberg quoted an internal memo from the world's biggest retailer calling their early February sales 'a total disaster.'

An employee in a food aisle of Wal-Mart's Chicago store.

Tim Boyle

AFP/Getty Images