Response from: Harry

This article is interesting but it has to be mentioned that for example poor indoor air quality is a topic since 30 years and none of this is related to Nanoparticles.
Emissions from chemicals used in building materials are the main source of these health risk creating substances.
Many chemicals present in indoor air environments have not been thoroughly tested and little is known about their long-term health effects.
However most of the high quality Nanotechnology products come with excessive test reports showing that there are no emissions released into the environment. It is also unclear how the nanoparticles will be set free. It is common knowledge that it is not possible to create nanoparticles simply by surface abrasion. They cannot be produced by mechanical processes such as brushing or grinding, because the strong van-der-Waals forces will keep them attached to one or the other surface and prevent them from being released into the air. Incorporated into paint or other coatings the particles don’t exist any more as nanoparticles.
It is not possible to separate the particles simply by adding water to the paint and wash them out. The only way to convince the customers is a clear testing regime with independent institutions.
For paint it is quite simple to do due to that there are already standards for emission testing. That building products will play a major role in the Nanotechnology implementation can be seen in the amount of products already listed in the nanotechnology product directory www.nanoshop.com . The possible improvements in indoor air quality and the reduction of waist due to longer lasting buildings and lower energy consumption and less maintenance cost and the better overall appearance should be taken into account. If builders and developers and architects are willing to use high quality and tested Nanotechnology products there is no way they can go pass this opportunity.