"Because stratospheric ozone provides protection from biologically damaging ultraviolet-B radiation, and because chlorofluorocarbons (CFCs) have been strongly implicated in the thinning of the Earth's stratospheric ozone layer, there is an urgent need to eliminate production and use of the. CFCs. In the U.S., CFCs were banned for use as propellants from nearly all aerosol products as early as 1978. In place of the CFC propellants, liquefied hydrocarbons such as propane, n-butane, and isobutane were found to be acceptable substitutes for the majority of aerosol products. This report provides technical assistance to aerosol product marketers and fillers in other nations now faced with eliminating CFCs under the terms of the Montreal Protocol. The report addresses the Issues of hydrocarbon propellant supply, product reformulation, equipment conversion, and safety concerns for both the manufacturing plants and the aerosol products themselves."