well, said 'dust' , would it be simply inert dust, or vermiculite dust Reno? I honestly don't know
Inasmuch as i've backed outta many an attic with something in my eye, or perhaps hacking for a bit, i really can't see inhalation of a substaintial (or perhaps i should say standard) piece of it without some sort of ongoing unease
i'm reminded of a patient that inhaled ONE pineneedle on my turf out here, the respiratory insult went on for months for her
and that was something organic
~S~