TTC Car Air Ventilation System
Ever look closely at the air ventilation system in some of the older TTC cars? You will be alarmed once you see the dirt on the vents! There is a ton of black dust and what looks like carbon on them and to think riders are breathing that crap in every day is alarming. I wonder how often the TTC air vent systems are cleaned. If you look at the walls of the subway tunnel you notice the same dust/black soot.