BENTONVILLE, Ark. — Wal-Mart Stores here announced several new energy-saving tests being conducted at Sam’s Club outlets yesterday at its Global Sustainability Milestone Meeting here. Solar power tests are taking place at five Sam’s clubs, with another three to be added by the end of the year, said Tim Yatsko, senior vice president, replenishment and planning for Wal-Mart. In addition, three tests are being conducted of carbon dioxide refrigeration systems “that we hope will deliver a more ...

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