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Glossary 

This glossary provides definitions of common terms used in the context of air pollution.

You can navigate quickly to a term using the alphabetic links below; clicking on the terms will show their definition.



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  • Oxides of Nitrogen (NOX)
    Combustion processes emit a mixture of nitrogen oxides (NOX), primarily nitric oxide (NO) which is quickly oxidised in the atmosphere to nitrogen dioxide (NO2). Nitrogen dioxide has a variety of environmental and health impacts. It is a respiratory irritant which may exacerbate asthma and possibly increase susceptibility to infections. In the presence of sunlight, it reacts with hydrocarbons to produce photochemical pollutants such as ozone. NO2 can be further oxidised in air to acidic gases, which contribute towards the generation of acid rain.
  • Ozone (O3)

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Page last modified: 14 February 2011