NOx are emitted into the atmosphere worldwide (Ing. Norbert Metz, 2005). Natural or biogenic sources include lightning, forest fires and agricultural nitrogenous fertilizers (Seinfeld, & Pandis, 1998 ). Anthropogenic sources are vehicles, stationary IC engines, thermal power plants, industrial boilers, incinerators, gas turbines, iron and steel mills, cement and glass industries, petroleum refineries, nitric acid manufacture, etc. (Seinfeld, & Pandis, 1998; Bond et al., 2001). NOx emissions from various…
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