US and Canadian regulators are developing a classification scheme for nanomaterials which shall contribute to the alignment of regulatory approaches on nanomaterials. 

Chances and risks of nanomaterials
Nanomaterials made from renewable resources could play an important role in the future: Cellulose nanofibrils can be used in nano-composites, films and coatings and even in photovoltaics (c.f. The promise of Wood-based nanotechnology).
Swedish researchers published a literature analysis of the public debate on antibacterial silver in Sweden. Supporters and opposition both rely on arguments regarding product quality, environment and health, among others – and both invoke scientific results.