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प्रश्न
Explain the term ‘air pollution’, with reference to air quality. State the sources of a few main pollutants.
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उत्तर
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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| Column I | Column II | ||
| (a) | \[\boxed{\text{D}}\]\[\boxed{\text{I}}\]\[\boxed{\text{L}}\]\[\boxed{\text{L}}\]\[\boxed{\text{M}}\]\[\boxed{\text{W}}\]\[\boxed{\text{I}}\]\[\boxed{\text{N}}\] | (a) | `squaresquaresquaresquaresquaresquaresquare square` |
| (b) | \[\boxed{\text{Y}}\]\[\boxed{\text{N}}\]\[\boxed{\text{O}}\]\[\boxed{\text{G}}\]\[\boxed{\text{X}}\]\[\boxed{\text{E}}\] | (b) | `squaresquaresquaresquaresquare square` |
| (c) | \[\boxed{\text{M}}\]\[\boxed{\text{E}}\]\[\boxed{\text{S}}\]\[\boxed{\text{K}}\]\[\boxed{\text{O}}\] | (c) | `squaresquaresquaresquaresquare` |
| (d) | \[\boxed{\text{T}}\]\[\boxed{\text{U}}\]\[\boxed{\text{D}}\]\[\boxed{\text{S}}\] | (d) | `squaresquaresquare` |
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