Higher temperatures would accelerate catalytic reaction cycles in the stratosphere, particularly reactions of nitrogen oxide gases known collectively as NOx that destroy ozone, Mills said. (phys.org)
nitrous oxide A gas composed of two atoms of nitrogen bound to one of oxygen. (sciencenewsforstudents.org)
The astronomers suggest that powerful winds on Kepler - 13Ab carry the titanium oxide gas around, condensing it into crystalline flakes that form clouds. (sciencedaily.com)