I use to think I had allergies in the past. Found out all the cause was industrial/household pollutants. Quite a few things will attack your respiratory/sinus systems. Paint's are really bad for me. I have issues with mold tho.

I was at a foundry a couple weeks ago, only for three hours. The place was horrendously filthy. You could grab filth out of the air with your hand, and you really had to watch where you were standing or you would get covered in foundry sand, I mean, it was coming down everywhere, and it should not be!

Anyway, that messed me up for a weekend! Glad I used a company laptop on that job. It still smells!

I really feel sorry for the people who work there! Seriously!!!