It's a funny thing - as a ashmatic suffering from mowing the grass - wet dogs - and sundry things like house dust - I feel really well when I'm at work diesel fumes and all. What really kills me at work is the stand cleaning detergent they use at LHR I avoid it like the plaque and the new mown grass. The atmosphere of areodromes may have it's drawbacks but to me - an ashmatic - usually it is a source of relief. A bit like the smell of a Tarmac laying machine - what it does in the long term to a person is debatable is another matter.