Question

The major air pollutant is:
A.CO
B.Oxides of nitrogen
C.Soot
D.Oxides of Sulphur

Answer 1

Hint: Air pollution refers to the release of pollutants such as gases, particles, biological molecules into the air that is harmful to human health and the environment. Moreover, there is a certain percentage of gases present in the atmosphere. An increase or decrease in the composition of these gasses harmful to survival.

Complete step by step answer:
Basically air pollution refers to any physical, chemical or biological change in the environment. Moreover, it is the contamination of air by harmful gases, dust and smoke which affects the plants, animals and humans drastically. Now, there are two types of air pollutants:
Primary air pollutants- These are the pollutants that directly cause air pollution. For example Sulphur dioxide emitted from factories.
Secondary pollutants-These are the pollutants that are formed by intermixing and reaction of primary pollutants. For example, smog.
Now, the major air pollutant is carbon monoxide (CO). It is one of the most harmful pollutants. It is produced by the incomplete combustion of carbon-containing fuels such as natural gas, oil, coal, gasoline and wood. This gas affects the amount of greenhouse gases that further results in global warming and climate change. Other gaseous pollutants are carbon dioxide, oxides of Sulphur, nitrogen, ozone and other oxidants.

Hence, option A is correct.

Note:
The use of solar, wind and geothermal energies can reduce the air pollution to a greater extent. Moreover, there are various other measures also that can control air pollution such as minimizing and reducing the use of fire and fire products, by diluting the air pollutants, tree plantation and many more.