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Question
Explain the term ‘air pollution’, with reference to air quality. State the sources of a few main pollutants.
Solution
Air pollution:
Mixing of products (elements) from natural sources and man made sources to air, to make it unclean is called air pollution.
The various sources of air pollution are:
| Natural Sources | Pollutant Released |
| (i) Decay of animal and vegetable matter | H2S, SO2 |
| (ii) Volcanic eruption | CO, SO2, H2S |
| (iii) Lightning discharge | Oxides of nitrogen |
| Man made sourses | Pollutants released |
| (i) Burning of fuels | CO, CO2, SO2 |
| (ii) Chemical industries | SO2, SO3, NO, NO2, CO, H2S |
| (iii) Iron and steel industries | CO2, CO, SO2 |
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