I just tried air purifiers in my growing base and those things are amazing at increasing your ups.
Turning almost 200 of those on gave me about 20 ups after they ran for an hour.
Pollution pollutes your game with decrease of UPS? XD
Pollution cloud activates stuff, like biters and chunks.
It's no problem at first, but when you make a big factory, pollution cloud and biters eat surprising amount of ups.
