-the number of active turfs on the status tab will be refreshed and the end of each tick and when the air controller setup finishes.

-mining rooms will be generated before the air controller is created
-changed the total of moles of the NO2 turfs from 2000 to 6000 to compensate the replacement of the canister that spawns like 36000 moles on top of it for a normal canister. I'm talking about the NO2 canister inside of the chamber in atmos. (I will replace the canister in another pull request)

code/controllers/master_controller.dm

@@ -41,6 +41,9 @@ datum/controller/game_controller/New()
 
 	createRandomZlevel()			//probably shouldn't be here!
 
+	for(var/i=0, i<max_secret_rooms, i++)
+		make_mining_asteroid_secret()
+
 	if(!events)
 		new /datum/controller/event()
 
@@ -68,9 +71,6 @@ datum/controller/game_controller/proc/setup()
 	setupgenetics()
 	setupfactions()
 
-	for(var/i=0, i<max_secret_rooms, i++)
-		make_mining_asteroid_secret()
-
 	spawn(0)
 		if(ticker)
 			ticker.pregame()
@@ -129,6 +129,7 @@ datum/controller/game_controller/proc/process()
 					last_thing_processed = air_master.type
 					air_master.process()
 					air_cost = (world.timeofday - timer) / 10
+					global_activeturfs = air_master.active_turfs.len
 
 				sleep(breather_ticks)