Question

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

Answer 1

The substance or matter which has undesired adverse effects on the environment and human beings is known as pollutant. Pollutants basically destroy the usefulness of environment and environmental products.

Complete step by step answer:
The substances which have undesired effects on the environment are known as pollutants. Pollutants adversely affect the natural resources and destroys their usefulness. The pollutants are categorized in many ways but here we are only discussing degradable and non degradable. The pollutants which are minimized or the concentration of the pollutants are decreased with the help of nature over time are known as biodegradable pollutants while the pollutants which adversely affects the environment and take thousands of years to degrade are known non-degradable pollutants.
Particulate pollutants: The hazardous mixture of both organic and inorganic particles which are suspended in the environment in solid and liquid states is known as particulate matter or particulate pollutants. Mist, dust and smog are the examples of particulate pollutants.
The pollutants which destroy the quality of air and make it unsuitable for living beings and plants are known as air pollutants. Carbon monoxide, lead, nitrogen oxide, ozone and sulphur dioxide are some of the examples of the air pollutants.
Among all of these air pollutants carbon monoxide ($CO$) is the most dangerous air pollutant. It is the major air pollutant which harms the health of beings to a large extent.

So, the correct answer is Option A .

Note:
In our daily life we face pollution and pollutants through a number of ways such as noise pollution, air pollution, heat pollution, light pollution, land pollution and many more types of pollution. The basic reason behind all these pollution is the radioactive contaminants of chemical compounds in the core particles.