Yes. The Libby mine produced 50% of the vermiculite attic insulation used in the U. S.
I grew up in a coal mining town in Montana so there were a few families l
That moved from Libby to where I grew up. A lot of kids got cancer fro the dust on their fathers’s work clothes. The company knew it was there but it was too profitable to just keep it mining vermiculite. The house I grew up in was built in the 20s and it had vermiculate in the attic. I don’t know if it had asbestos in it but asbestos is inert unless you mess around with it so I never went in the attic.