DIESEL EMISSIONS

Road transport is a source of air pollutants which can have adverse effects at various scales. The air pollutants which are currently causing greatest concern in terms of local air quality, primarily because of their impacts on human health, are airborne PM, NO 2 and ground-level ozone5. Road transport is an important contributor to all three. Emissions of nitrogen oxides (NO x) from road vehicles are also implicated in regional phenomena such as acidification, eutrophication and loss of biodiversity, as well as the formation of secondary PM in the atmosphere. Moreover, road transport is a major source of the greenhouse gases carbon dioxide (CO 2), methane (CH 4) and nitrous oxide... The significance of road transport as a source of air pollution can be illustrated by reference to sectoral emissions for the EU-27 countries, based on submissions to the UNECE Convention on Long-Range Transboundary Air Pollution (CLRTAP). Road transport is a significant contributor to NO x emissions (41%..