Ozone (O3) is one of the most powerful oxidizers available. O3 doesn't just mask odors like mere air fresheners, it neutralizes odors at the source, then harmlessly converts to CO2 and oxygen. Ozone eliminates odors caused by moulds, mildew and damp basements. It even tackles unpleasant odors from tobacco smoke, pets and cooking. In nature, ozone is generated as a byproduct of electrical current in the air and accounts for the wonderful fresh air scent after a lightning storm, and of course the ozone layer is created by the UV radiation of the sun. Commercially, ozone is produced in a similar fashion — ultraviolet light (UV) and corona discharge (CD). CD technology passes air over electrically charged metal plates and produces the highest concentrations of ozone. UV technology passes air over an ultraviolet bulb to achieve the same end at lower concentrations. O.E.T.I. manufactures both systems for applications in air treatment.