Nitrogen oxides , first pollution

In this chapter we will examine the atmospheric degradation mechanisms of the following important classes of anthropogenic molecules alkanes, alkenes, aromatics, nitrogen oxides, S()2, CFCs and Halons, and finally HFCs and HCFCs. Our intent is not to give an exhaustive account of the photochemical oxidation of every man-made chemical species but rather to present examples of the degradation mechanisms of a few representative members of each class of pollutant. First, we need to consider the general features of atmospheric chemistry. 

Spurred by more developed research findings and continued negative environmental and human health effects, UNECE member states adopted the first protocol in 1985 in Helsinki, Finland. This updated document acknowledges the effect of nitrogen oxides and other pollutants on air quality, but continues to focus on sulfur emissions. Great attention had been... 

European satellites followed the Soviet leadership and joined the treaty (Darst 2001 Levy 1993). All communist countries except Poland ratified the First Sulfur Protocol (1985), which required 30% reduction of 1980 levels of SOj( emissions, but did little in terms of implementation during the 1980s beyond measures that addressed local air pollution. In 1988, CEE countries became parties to the Protocol on Nitrogen Oxides (NO, ), which required stabilization of NO, at 1987 levels by 1994. 

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