Environmental data treatment to support exposure studies: The statistical behavior for NO, O, PM10 and PM2.5 air concentrations in Europe.

In determining and assessing external exposure, there is a need for extensive environmental data sets of sufficient time and space resolution. It is unlikely that a complete set of those data exist for a specific study. Therefore, there will be a need to fill the necessary data gaps.

Investigation of the PM, NO and O I/O ratios for office and school microenvironments.

Differentiation of the exposure to PM (particulate matter less than 2.5 μm in aerodynamic diameter), NO and O i.e.