Re:Actually... (Score 1)

Very true. But before we get into Nanotubes, we probably should take a look at Fiberglass; it is a class 2B material according to the IARC. This concerns mainly specialty products like electrical and heat insulation, not so much general home insulation, where, as far as I know, it is the most commonly used insulating material around the world. (but insulating fiber glass is only class 3, so no need to be overly scared). Still, there are saver replacements, high bio soluble fibers. (Wikipedia knows everything)