A system is urgently needed to prevent ozone-depleting gases contained in insulation material being released into the atmosphere, the Environment Ministry said Friday.

In a report outlining a national chlorofluorocarbon management strategy, the ministry said it will review methods to collect and process CFCs used for insulation in home appliances and building materials, with an eye to legally enforcing the retrieval and destruction of those used in appliances.

Nearly 30 percent of CFCs are used as refrigerants, while most of the rest are used for insulation. A fraction — less than 1 percent — is used in aerosol sprays and as solvents.