An overhaul of the air filtering mod by Schorty. Includes complex air filtering steps to remove pollution.
Mods introducing new content into the game.
Map generation and terrain modification.
How do you refresh a used air filter? There doesn't seem to be any indication on how this is done...
Thank you for the excellent question. I might be too late with my answer, but here goes:
There's a recipe for recycling filters that uses coal and used air filters to restore them (unlocked via research).
