Nanomaterials describe, in principle, materials of which a single unit is sized (in at least one dimension) between 1 to 1000 nanometres (10−9 meter) but usually is 1 to 100 nm (the usual definition of nanoscale).
An EU study addressed the weaknesses of integrated assessment models (IAMs) in predicting the economic effects of climate change. The project revealed large uncertainties about the effects in several regions, and created more accurate modelling techniques.