/Food retail/

THE PIG’S NH3 /CO2 EXPERIMENT JTM Corp.’s year-old Piggly Wiggly store in Columbus, Ga., saved an average of 28.5% in energy usage over a sevenmonth period, thanks mainly to its NH3/CO2 refrigeration system. But will ammonia prove viable for supermarkets? – By Michael Garry

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Accelerate America September 2016