Emission data are reported country by country. Emissions over Europe is uneven. This

is shown in figure 1.1 for 150 x 150 km grids. In urban areas traffic will generally

make larger contributions to total NOx emissions than at national levels. This is not

reflected in such a large grid. For example in the UK national emissions from road

traffic contribute about 50% of total emissions compared with over 85% in the West

Midlands conurbation. At the street level the traffic contribution may be even greater.

Table 1.2. shows emission data per person, per unit area and change in total emissions

over the period 1980 to 1993. The spatial emission distribution for NOx is also shown

in Figure 1.1.

 

 

 

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