Contains no CFC's or other ozone depleting substances. Federal regulations prohibit CFC propellants in aerosols. This product cleans your air of bacteria & their odors. Unlike other air fresheners that only mask odors, this product eliminates tough odors such as smoke, food, mold, mildew, bathroom, and pet odors...Air so clean you can smell the freshness. Cleans Your Air of Bacteria & Their Odors Kill 99.9% of Bacteria***