Some Chinese coal ash too radioactive for reuse

[antares4141]

I've eliminated every variable (mainly mold) but the drywall inside my building seems to be making me sick! I didn't understand it cause drywall is made from gypsum and that can't make you sick right?
Not unless it's Chinese drywall which I thought had some corrosive compound in it.

https://phys.org/news/2017-11-chinese-coal-ash-radioactive-reuse.html