http://www.elektor.fr/nouvelles/nanotub ... 8037.lynkx
Nearly 40 years ago, laboratory experiments have shown that the harmfulness of asbestos is not related to chemical properties but to mechanical properties because it is a material made of extremely fine fibers that can be divided into even finer fibers. The problem is there, below a certain diameter it becomes carcinogenic. Extremely fine glass fibers gave the same results as asbestos.
NB: I try to make as few mistakes as possible, I don't want to offend anyone but "asbestos" is a masculine name, absolutely not a feminine name. So we have to say and write "is asbestos" and absolutely not "is asbestos". My excuses.