PORTSMOUTH, Va. — Food Lion has unveiled here what it describes as the nation's first grocery store to incorporate two ozone-friendly product refrigeration systems. Both systems, based on secondary-coolant technology, reduce by more than 60% the amount of refrigerants needed to keep products cool or frozen. One of the systems uses water and glycol in a medium-temperature unit, while the other employs carbon dioxide for low-temperature cooling. The chain, owned by Brussels-based Delhaize ...

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