The union has launched legal action against five UK airlines, and urged them to clean up their act.
It has called for an inquiry into what it describes as “toxic cabin air”, with air contaminated by engine fumes containing toxic organophosphates and TCP used to pressurise airline cabins.
Citing “expert evidence”, the union says long-term exposure to this cabin air or other “fume events” can cause irreversible neurological damage and chronic illness.
Unite wants the airline industry to use safer oils to lubricate jet engines and fit aircraft cabins with filters.