tailieunhanh - Air pollution by ozone in Europe in summer 2005
Particulate emissions from road transport arise as direct emissions from vehicle exhausts, tyre and brake wear and resuspension of road dust. In urban areas, emissions from road transport are thought to be the major source of PM10. In general, diesel engine vehicles emit a greater mass of fine particulate matter, per vehicle, than petrol engines. Diesel emissions are mainly composed of soot particles, volatile hydrocarbons and some sulphate from the fuel sulphur. When hydrocarbons and sulphates are released by the car exhaust they condense on airborne particles, mainly on the freshly emitted carbon. The size distribution of these particles tends to be bimodal, with particles of. | EEA Technical report I No 3 2006 Air pollution by ozone in Europe in summer 2005 Overview of exceedances of EC ozone threshold values for April-September 2005 ISSN 1725-2237 B__ European Environment Agency 1 EEA Technical report I No 3 2006 Air pollution by ozone in Europe in summer 2005 Overview of exceedances of EC ozone threshold values for April-September 2005 B__ European Environment Agency
đang nạp các trang xem trước