Author(s): J.M. Baldasano & E. Valera
In the past few years, the more developed countries have made great efforts to
improve air quality through the adoption of clean air plans which have included
measures such as: stricter emission and air quality regulations, continuous air
quality monitoring in urban and industrial centres and the use of cleaner fuels
such as natural gas, among others.
At the same time, in developing countries,
there is a clearly perceivable phenomenon of migration from the countryside to
the city, which has brought as a consequence greater emissions into the
atmosphere, mainly produced by the increase in the number of vehicles
circulating, with the additional difficulty that in these countries the tendency is to
have a stock of older, worse maintained vehicles than in developed countries,
where the nu...
Size: 1,135 kb
Paper DOI: 10.2495/AIR010171
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