The lack of understanding about possible cancerous effects of nano materials worries me, especially with stuff like this and "nanocosmetic" materials. I'd just hate to find out 20 years down the road that all of our miracle materials were slowly killing us.
The lack of understanding about possible cancerous effects of wifi worries me, especially with stuff like this and "cellular" phones. The lack of understanding about possible cancerous effects of CRT screens worries me, especially with stuff like this and "digital" displays. The lack of understanding about possible cancerous effects of GMO food worries me... The lack of understanding about possible cancerous effects…
I think it was a perfectly valid comment: we really don't understand biological interactions at nanostructured interfaces all that well. See eg. all these hand-waving explanations for the supposed toxicity of carbon nanotubes http://www.nature.com/news/2008/080520/full/news.2008.845.ht...
(btw, CRT screens emit beta radiation, so if you'd sit close enough...)