1.

Answer the following questions briefly: (i) Why is carbon dioxide considered an air pollutant ? (ii) Name any two vaccines and mention the diseases against which they give immunity. (iii) Mention two reasons for the high birth rate in India. (iv) State two effects of the smog observed, in major cities.

Answer»

(i) Carbon dioxide is considered as an air pollutant. Because it mixses with oxygen present in air and forms carbon monoxide which is harmful to man, vegetation, animals or even buildings. 

(ii) BCG vaccine is given against tuberculosis. DPT vaccine is given against the diseases viz; Diptheria, Pertussis and Tetanus. 

(iii) 1. Illiteracy 

2. Desire for a male child.



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