An overhaul of the air filtering mod by Schorty. Includes complex air filtering steps to remove pollution.
When placing a filter, it should show the affected area on the minimap, just like a radar does.
Thank you for the suggestion. This is also something I was looking into already (https://github.com/JoeyDP/Factorio-Better-Air-Filtering/projects/1). Don't know how to implement it efficiently though..