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Sources of air pollution

Motor vehicles are major source of air pollution in urban areas and need to be controlled.

health and fitness Updated: May 24, 2003 19:52 IST

Air pollution is one of the negative aspects of industrialisation. Every industrialised nation pollutes air. However, in poorer countries, less resources in terms of money and effort are spent on precautionary methods. There is overpopulation, fewer green belts and machinery is often not well maintained to minimise pollution.

The air we breathe carries residues from the following sources:

    Burning: Smoke, dust and sulphur dioxide emanating from industrial and domestic combustion of coal, oil and other fuel pollute the air.

    Polluting Industries: Chemical, metallurgical industries, oil refineries, fertiliser factories.

    Modern transport: Motor vehicles are the major source of air pollution in the urban areas. Motor vehicles, trucks, trains, aircraft and other forms of transport contribute to air pollution by emitting hydrocarbons, carbon monoxide, lead, nitrogen oxides and particulate matter. In strong sunlight some of these hydrocarbons and oxides of nitrogen may be converted in the atmosphere into a photochemical pollutant of an oxidising nature. The problem becomes worse in poorly maintained vehicles.

    Burning of refuse and Nuclear programs: also contribute to air pollution.


First Published: May 24, 2003 19:52 IST