Question

Define air pollutants.

• A. Substances that escape the environment quickly and are harmful to health are called air pollutants.
• B. Substances that mix up with the air and are injurious to health and causes inconvenience to animals and plants are called air pollutants.
• C. Substances that helps in the growing of trees are called as air pollutants.
• D. Substances that mix in clean water and cannot be easily removed are called air pollutants.

Answer 1

The correct option is B Substances that mix up with the air and are injurious to health and causes inconvenience to animals and plants are called air pollutants.

Air pollution refers to any physical, chemical or biological change in the air. It is the contamination of air by harmful gases, dust and smoke which affects plants, animals and humans drastically.

Air pollution is caused by mixing up of air with materials injurious to health and causes inconvenience to animals and plants. The substances that cause air pollution are called air pollutants.