HP facilities use ozone-depleting substances (ODSs) in cooling and air-conditioning systems. Although these systems are sealed, leaks during operation and maintenance can result in emissions. We continue to replace chlorofluorocarbons (CFCs) in our existing systems with hydrofluorocarbons (HFCs). HFCs are greenhouse gases, but do not deplete the ozone layer. We are also replacing HFC-based cooling systems with HFC-free equivalents when they reach the end of their operational lives. These HFC-free equivalents are not ozone-depleting and have no or very low global warming potential. HP completely eliminated the use of Class 1 ODSs in all manufacturing operations in 1993.