An oxygen chemical compound of the form 03 instead of 02 (common atmosphereic oxygen). This 3-atom molecule is an even more active oxidizing agent than its more common 2-atom relative. At ground level, ozone is a pollutant and in the upper atmosphere it is a UV shield. Ozone's highly reactive nature tends to accelerate the breakdown of synthetic materials such as paints, plastics, and volatile organic compounds.

Related resource: BSI-017: Blame It On Star Trek—Solving IAQ Problems