Ozone/Legends

Ozone was a type of gas emitted by excess energy in the air, often caused by the firing of laser and blaster weapons. The odor was pungent and noticeable, and one could choke on it, but the gas itself was colorless.

Planets had ozone in their atmospheres; Roon was one such planet. This ozone restricted ultraviolet light's ability to pass freely to the surface of the planet. However, some planets lacked ozone in their atmospheres. A planet which experienced the lack of ozone was Af'El. On Af'El, the native Defel had adapted to cope with this additional ultraviolet light.

Appearances

 * Cantina Communications
 * Star Wars Episode III: Revenge of the Sith novel