Nano materials are a category of material that has gone from the status of great white hope for the future to major threat to life on the planet without going through the normal intermediate stages of being widely used for anything useful or giving rise to any actual problems.
Unfortunately the blog post that was here got lost during the transfer from one host to another. I will come back and rewrite it as soon as I can.
In the meantime, I have posted my video on the subject.
Apologies – Colin