Oddly, I was down a coal mine from age 18 - 27.
In the last decade or so it seemed to be workshop dust (mostly wood and MDF) that was the issue - worse when the cleaning contract was reduced and the daily wet cleaning became once a term.
I'm probably getting most of my harmful stuff from cycling in London air.
I haven't worked with wood or metal since I was early twenties back in Oz.
I've sat in a climate controlled office for the last 10ish years.
Oddly, I was down a coal mine from age 18 - 27.
In the last decade or so it seemed to be workshop dust (mostly wood and MDF) that was the issue - worse when the cleaning contract was reduced and the daily wet cleaning became once a term.