Interesting thanks. If this guy is to be believed, asbestos and other "amphiboles" are different from nanotubes insofar as they have small metal/iron content,

Interesting thanks. If this guy is to be believed, asbestos and other "amphiboles" are different from nanotubes insofar as they have small metal/iron content, which you can imagine reacting with oxygen in the lungs in a harmful way that something made from pure carbon may not. https://www.youtube.com/watch?v=KuHL7hiFTnc https://www.youtube.com/watch?v=KuHL7hiFTnc Now, on the other hand, if those carbon nanotube particles were all as sharp as tiny diamonds, you could imagine them being pretty bad to inhale.