Pollution is now a common place term, that our ears are attuned to. We hear about the various forms of pollution and read about it through the mass media.
A physical, biological or chemical alteration to the air in the atmosphere can be termed as pollution. It occurs when any harmful gases, dust, smoke enters into the atmosphere and makes it difficult for plants, animals and humans to survive as the air becomes dirty.
Air pollution can further be classified into two sections- Visible air pollution and invisible air pollution. Another way of looking at Air pollution could be any substance that holds the potential to hinder the atmosphere or the well-being of the living beings surviving in it.
Some of you might wonder what types of air pollutants are there
It is actually quite simple and straight forward
Air pollutants can be differentiated in two groups
Primary air pollutants can be caused by primary sources or secondary sources. The pollutants that are a direct result of a process can be called primary pollutants. A classic example of a primary pollutant would be the sulphur-dioxide emitted from factories
Secondary pollutants are the ones that are caused by the blending and reactions of primary pollutants. Smog created by the interactions of several primary pollutants is known to be as secondary pollutant. Human-made smog is derived from coal emissions, vehicular emissions, industrial emissions, forest and agricultural fires and photochemical reactions of these emissions.
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