Paranoid updates to maybe fix air duplication

code/modules/mob/living/carbon/life.dm

@@ -115,11 +115,11 @@
 				breath = loc_as_obj.handle_internal_lifeform(src, BREATH_VOLUME)
 
 			else if(isturf(loc)) //Breathe from loc as turf
-				var/breath_moles = 0
+				var/breath_ratio = 0
 				if(environment)
-					breath_moles = environment.total_moles()*BREATH_PERCENTAGE
+					breath_ratio = BREATH_VOLUME/environment.return_volume()
 
-				breath = loc.remove_air(breath_moles)
+				breath = loc.remove_air_ratio(breath_ratio)
 		else //Breathe from loc as obj again
 			if(istype(loc, /obj/))
 				var/obj/loc_as_obj = loc

code/modules/mob/living/simple_animal/bot/mulebot.dm

@@ -753,6 +753,12 @@
 	else
 		return null
 
+/mob/living/simple_animal/bot/mulebot/remove_air_ratio(ratio)
+	if(loc)
+		return loc.remove_air_ratio(ratio)
+	else
+		return null
+
 /mob/living/simple_animal/bot/mulebot/do_resist()
 	. = ..()
 	if(load)