Supermarkets continue to be in the thick of the debate over the environment. It all stems from an international agreement among industrialized nations, the Montreal Protocol, to stop the use of ozone-depleting chemicals. As part of that agreement, the United States is obligated to make progress toward a total phaseout of refrigerants used by supermarkets, such as CFCs (chlorofluorocarbons), including Freon, and HCFCs (hydrochlorofluorocarbons), including the refrigerant R-22. As of Jan. 1, ...

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