CORRECTION

Hydrofluorocarbon gases, an alternative coolant supermarkets are evaluating as they phase out ozone-damaging chlorofluorocarbons, are chlorine-free. The gas was incorrectly described in an article and headline on page 15 of the Aug. 26 issue.

Hydrofluorocarbon gases, an alternative coolant supermarkets are evaluating as they phase out ozone-damaging chlorofluorocarbons, are chlorine-free. The gas was incorrectly described in an article and headline on page 15 of the Aug. 26 issue.