Cirrifog

Cirrifog was the term applied to unique microcrystals found in Monor II's atmosphere. Thick and pearlescent, they caused the air of the world to be dangerous for most sentients to breathe—billions of the crystals could be found in any given cubic meter of atmosphere. Naturally, the Sunesi, native to Monor II, adapted to their environment; so much so, in fact, that young Sunesi would die without the cirrifog. During their metamorphosis into adults, juveniles actually used the crystals to create a sort of cocoon.

When Eujustus Kline discovered cirrifog, the Galactic Empire immediately began mining the minerals. With the youth of Monor II threatened by the depletion of the cirrifog, Agapos the Ninth openly objected to the Empire's actions—earning him a death sentence.

Text and facts from the “Cirrifog” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.