Adds the Smog planet to Warptorio2.
See main mod page: https://mods.factorio.com/mod/warptorio2
Planet Pack: https://mods.factorio.com/mod/warptorio_planet_pack
Credit to darkfrei for his work on the Smog / Visual Pollution Mod:
https://mods.factorio.com/mod/SmogVisualPollution
