In the past decade numerous projects on the risks associated with nanomaterials have been initiated and carried out. In general, they dealt with the subject of how nanomaterials could be used without representing a danger to the environment and human health. However a lack of specialists is preventing further urgently needed studies in the field of nano(eco)toxicology from being undertaken. In addition there are numerous gaps - some quite large -.in our knowledge of this subject. These are the conclusions drawn in two reports recently made public, in both of which Empa nanotoxicologist Harald Krug was significantly involved.