[xyzzy123]

Do you know if they ruled out the resins used to bind stuff together?

In theory perfectly cured resins are supposed to be non-toxic (eg food safe) but you can get sensitised to specific mixes or accelerants and sometimes the curing isn't perfect...

EDIT: It looks like they considered it but didn't come to any firm conclusions, further research needed etc.

[acdha]

The theory I’ve heard would make a lot of sense: the resin coating prevents natural breakdown, similar to how asbestos victims never recover while small glass fragments are eventually removed. I hope that some researcher figures this out because I’d bet it’ll be applicable to more than just this product.