Toxic Cabin air, the cause of neurological problems

long-term–low-level (LTLL) contamination, such as that to which aircrew are exposed, has been shown to be more injurious than short-term acute exposure. Aircrew breathe
the low-level toxicity every minute of their working days. When an aircraft lands the passengers disembark, but the crew turn around and do it all over again, time and time again. Perhaps there has too much emphasis on fume events, while the real damage is being done by LTLL.