Ozone, when introduced into the atmosphere in low levels is an excellent air purifier. When an ozone molecule contacts a pollutant, it attaches itself to it and changes its molecular structure in most cases to carbon dioxide and hydrogen. By destroying viruses, bacteria and other microbiological contaminants, the source of the odour is eliminated and the odour does not return. Ozone destroys the contaminant molecule; it does not mask it as other methods do. Ozone treats all of the air, not just the air that is pulled into it as do the vast majority of electronic filters that are on the market today.