Wal-Mart employee Dayngel Fernandez stocks shelves in the produce department of a Miami store in February. Activists say the company's recent corporate policy changes don't address systemic labor and environmental problems. Joe Raedle/Getty Images hide caption

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Jessey Drewsen, 25, lives near the H Street Wal-Mart in Washington, D.C. She says she doesn't like the store, but that she goes there for cheap supplies like pens. Emily Jan/NPR hide caption

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A woman pushes a cart at a Costco store in Hackensack, N.J., in 2013. Big-box stores are effective delivery devices for fattening foods, economists argue in a new study. Ron Antonelli/Bloomberg via Getty Images hide caption

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Customers in Bentonville, Ark., where Walmart's corporate headquarters are located, turn out for holiday shopping on Thanksgiving. Gunnar Rathbun/Invision for Walmart/AP hide caption

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A customer makes a purchase using Apple Pay on her iPhone 6 at a Walgreens store in Times Square last Monday. The mobile payment service has now been blocked by CVS and Rite Aid. John Minchillo/AP Images for MasterCard hide caption

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A Bangladeshi worker participates in a protest outside a garment factory in Dhaka, Bangladesh, on Sunday. Hundreds of garment workers demanded better conditions. A.M. Ahad/AP hide caption

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A shopper walks down an aisle in a newly opened Wal-Mart Neighborhood Market in Chicago. Jim Young/Reuters /Landov hide caption

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Cory Booker is mayor of Newark, New Jersey and honorary vice-chair of the Partnership for a Healthier America. Doug Van Sant hide caption

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