Does anyone care about the ground handlers, particularly the refuellers standing in the vicinity of smoking engines during turnrounds. I can assure you, the fumes are very noticeable for some time after the engines are shut down and you can't avoid breathing in this cocktail of poison to the hematopoietic system, lymphatic system, nervous system, and reproductive system. The Benzene component is a known carcinogen.- not the same as being in a pressurised cabin, but very noticeable.