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Figure 20


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Niveaux de pollution à l’ozone à 23h00 TU et valeurs des pics journaliers de pollution à l’ozone à Ben Arous au cours du mois de mai 1998. Les symboles indiquent les journées à inversion de température. Levels of ozone pollution at 11 p.m and values of daily ozone pollution’ peaks during May 1998. The patterns indicate the days with temperature inversions.

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