大气污染英文原稿.ppt

Air Pollution definition Forming condition Air pollutionproblem Damage safeguard BACK Air pollution definition： According to the international standard organization ?(ISO), the definition of air pollution usually refers to ?human activity or natural process cause certain substances into the atmosphere, then present a enough concentration, achieve enough time, and ?endangers the bodys comfort, health and welfare or environmental pollution phenomenon. In the dry and clean atmosphere, to measure the composition of the gas is negligible.But in a certain range of the atmosphere, there are some substance that no appearing before, the amount and duration of these substance, is likely to produce adverse effect and harm for people, animals, plants and goods and materials. When the concentration of pollutants in the atmosphere reach harmful degree, even destroy the ecological system and human development of normal conditions, cause harm to people or things phenomenon called atmospheric pollution. Reason of air pollution The cause of air pollution, both natural factors and human factors, especially the man-made factors, such as industrial waste gas, combustion, automobile exhaust and nuclear explosion. With the rapid development of human economic activity and production, consume a large amount of energy, at the same time, it will output a lot of waste gas, dust material to discharged into the atmosphere, these seriously affect the quality of the atmospheric environment, Particulate matter： Sulfur oxide： Oxycarbide Oxynitride： Hydrocarbon Other hazardous substance BACK The blacklist of air pollution Air pollutionproblem Greenhouse effect BACK Dust -haze Acid rain Ozone hole Fuel contains a variety of complex components, produce all kinds of harmful substances after burning, even excluding fuel impurities to achieve complete combustion, also want to produce water and carbon dioxide, and because of fuel combustion to the increasing