Acid rain

Acid rain was caustic rainfall which was known to occur on the planet Vjun. Jaden Korr and Kyle Katarn experienced acid rain on a mission to Bast Castle. Acid rain also fell in The Works on Coruscant, on the junk world of Lotho Minor, and on a planet with glass rain, the latter being severe enough to have the assassin droid AG-37 suffer extreme damage from exposure.

Acid rain was a common phenomenon on factory worlds, specific planets with large manufacturing plants and industrial output, on which the environment was usually polluted enough for the rain to occur on a frequent basis.

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