Credits EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 EAc4 Program to evaluate and regulate substitutes for the ozone-depleting chemicals that are being phased out under the Clean Air Act. Resource type Organizations Link http://www.epa.gov/ozone/snap/index.html