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.

Glossary 



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  • 1,3-Butadiene (C4H6)
    1,3-butadiene, like benzene, is an organic compound emitted into the atmosphere principally from fuel combustion e.g. petrol and diesel vehicles. Unlike benzene, however, it is not a constituent of the fuel but is produced by the combustion of olefins. 1,3-butadiene is also an important chemical in certain industrial processes, particularly the manufacture of synthetic rubber. It is handled in bulk at a small number of industrial locations. Other than in the vicinity of such locations, the dominant source of 1,3-butadiene in the atmosphere is the motor vehicle. 1,3-Butadiene is a known, potent, human carcinogen.

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