Emissions of CO, NOx, NMVOCs, PM10, PM2.5 and SOX can be grouped into acidifying substances, particulates and ozone precursors. Transport contributes significantly to emissions of NOX, NMVOCs, PM and CO. NOX contributes to acidification, formation of ground level ozone and particulate formation.• PM2.5: particulate matter with aerodynamic diameter of 2.5 μm or less;• PM10: particulate matter with aerodynamic diameter of 10 μm or less;• NMVOCs: non-methane volatile organic compounds;• SOX: sulphur oxides;• NOX: nitrogen oxides;• CO: carbon monoxide.