The papers are generally available only in their original language -English or French- with a summary in the other language. The use of such data by the OECD is without prejudice to the status of the Golan Heights, East Jerusalem and Israeli settlements in the West Bank under the terms of international law. Using a unique dataset of 249 Large Urban Zones (LUZ) across Europe, a Bayesian Model Averaging selection method is employed to empirically identify the determinants of within-LUZ concentration of three air pollutants: NCL, PMi0 and SO2 for the year 2006. Several indices of land use are considered among possible determinants.