Walgreens recently opened what it believes to be the USA’s first net zero en¬ergy retail store, anticipated to produce energy equal to or greater than it consumes. The store features two 35 ft (10.7 m) wind turbines, nearly 850 solar panels and a geother¬mal system burrowed 550 ft (168 m) into the ground. Additional ‘green’ features in¬clude LED lighting and day¬light harvesting, and use of carbon dioxide as a refriger¬ant for heating, cooling and refrigeration equipment. As the USA’s largest drug¬store chain with fiscal 2013 sales of $72 billion, Walgreens operates 8,131 drugstores. (Source: The HVAC&R Industry, December 19, 2013)
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