Introduction
Air
Starting from the 70s in all the industrialized Countries, the number of circulating vehicles has been increasing constantly. Through fine dust, carbon dioxide, nitrogen oxide and volatile organic compound emissions cars and other means of transport contribute in a preponderant manner to determining the low quality of air in the urban centres. Limiting the levels of concentration of pollutants, in particular fine dusts in our cities must take place principally by decreasing traffic of motor vehicles.
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