1.

(a) What do you understand by the term polluted air?(b) State and explain two ways by which air gets polluted in nature.

Answer»

(a) When the air contains harmful or undesirable substances, generated by the activities of man or nature, such that their concentration interferes with human health or is injurious to plants or animals, it is said to be polluted air.

(b) Air gets polluted in nature by following ways :

  • During the forest fire, a large number of carbon particles (smoke) and carbon monoxide pollute the air.
  • When volcanoes erupt, a huge amount of ash and sulfur-dioxide is added to the air as pollutants.


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