1996 | OriginalPaper | Chapter
General Overview
Author : Prof. Dr.-Ing. Günter Baumbach
Published in: Air Quality Control
Publisher: Springer Berlin Heidelberg
Included in: Professional Book Archive
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Generally, all substances changing the natural composition of air are considered pollutants. Gaseous components of naturally clean air are listed in Table 1.1. Apart from these substances, natural air can contain further components such as water vapor and traces of other gases, e.g., methane CH4, ammonia NH3, carbon monoxide CO and dinitric oxide N2O as a result of decomposition processes, as well as low concentrations of ozone, possibly as a result of stratospheric penetration.