Air Wick Air Freshener features 100 percent natural propellant in its aerosol container. Unlike traditional aerosols that release chemical propellants, Air Wick Fresh Waters is propelled only by fresh air to deliver a cleaner fragrance experience in a dynamic soft mist spray and is still as long-lasting and effective as previous Air Wick aerosols at eliminating even strong odors. Natural propellant leaves 40 percent less carbon footprint per unit than traditional Air Wick aerosols.