Interesting. Nanotubes also look like they have a future in computing, supercapacitors, batteries, bioengineering, structural material.....
I suspect they will be determined to be a carcinogen and banned.
I suspect that it is only "loose" nanotubes that are carcinogenic. To be useful in ultracapacitors, they will undoubtedly be secured (actually grown) on sheet electrodes.
IIRC, even asbestos can still be used for some applications. Stringent safety measures during manufacture (or disposal) of anything that uses them, but once secured and rendered immobile in a matrix, are "OK".
I suspect they will be determined to be a carcinogen and banned.
***That rings a bell. I think I remember hearing about CNTs causing cancer. The thing is, they’re so small that they disrupt cell membranes very easily.