Some of these materials would contain only a few percent asbestos mineral as a binder, while others would be mostly or entirely composed out of asbestos. What had begun as mostly a curiosity ...

On the coast of Newfoundland, waste from a shuttered asbestos mine has been a troubling source of contamination for decades.

Asbestos is a strong, natural mineral fiber that is resistant to heat ... and composed of very fine fibers. Rock wool is a loose-fill insulation that has a fibrous, soft, cottony texture.