Air Wick Air Freshener features 100 percent natural propellant in its aerosol container. Unlike traditional aerosols that release chemical propellants, Air Wick Lavender & Chamomile 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.