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Department of the Environment,
Transport and the Regions

Nitrogen Dioxide

Figures 1-4

Figure 1    Estimated United Kingdom emissions of oxides of nitrogen since 1970. thousand tonnes per year.
Graph
 

Figure 2   Department of the Environment Automatic Monitoring sites for nitrogen dioxide as at August 1996.
Map
 

Figure 3   Hourly average nitrogen dioxide concentrations at three sites in London during the December 1991 pollution episode.
Graph

Figure 4   Temporal trends in annual average, and the number of hours exceeding 150ppb, for nitrogen dioxide at a site in Victoria, central London (1977-1995).
Graph

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Published 29 October 1998
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