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What is Pollution

Pollution is an undesirable change in physical, chemical or biological characteristics of air, land and water caused by excessive accumulation of pollutants (substances that cause pollution).

pollution can be classified in many ways. On the basis of part of the environment where it occurs most (atmosphere, hydrosphere and lithosphere), it can be classified as air pollution and soil pollution.

From the ecosystem, viewpoint pollutants can be categorised into non-biodegradable and biodegradable pollutants.

Non-biodegradable materials, such as chlorinated hydrocarbon pesticides (DDT, BHC, waste plastic bottles, polythene bags, used soft- drink cans etc., are either not degraded or degraded by only very slowly by decomposers in nature.

Biodegradable pollutants, such as market garbage, livestock waste, municipal sewage, etc, on the other hand, can be decomposed effectively by the decomposers.

Air pollutions: Sources, Type and Effects

You know there is much more to say about the pollution but I'm still not telling you the actual,
so we should proceed now.

 Degradation of air quality and naturals atmospheric conditions constitute air pollution.

  • Natural sources of air pollution include pollen, dust, and smoke (from a forest fire and volcanic ash) which are emitted into the atmosphere.

  • Nitrogen oxides cause the reddish-brown haze (brown air) in the traffic-congested city which contributes to heart and lung problems and may be carcinogenic. It also contributes to acid rain because they combine with water droplets to produce nitric acid (HNO3) and other acids.
Photochemical smog: The classical example of a secondary pollutant, photochemical smog is formed in traffic-congested metropolitan cities where warm condition and intense solar radiations are present.
photochemical smog is composed of mainly of ozone (O3),  peroxyacetyl nitrate(PAN) and NOx. It is often called brown air where solar radiation is intense.

Grey air: In areas or season of lesser solar radiation, smog formation is incomplete and the air is referred to as Grey air.


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    1. yeah.. we will be glad. We have lot more things in our brain related to pollution. Danke

  2. Hey, nice insights on pollution. Actually recently I was researching on the environment pollution and searching here and there for collecting information.

    You post is quiet nice and informative to me. But I think it can be more insightful if you add some more details like the ways to cope with pollution and such topics. Or you an publish new post regarding some additional but related topics soon. Let me know your thought. Cheers.

    1. grazie, we are glad to hear this from you. We will post a brand new content on this.