How do the following pollutants are added in air?
(a) Sulphur dioxide:
(b) Nitrogen dioxide:
Which of the following air pollutant reduces the oxygen-carrying capacity of blood to a large extent?
(a) carbon dioxide
(b) nitrogen monoxide
(c) carbon monoxide
(d) sulphur dioxide
The constituent of polluted air which contributes in producing acid rain is:
(a) nitrogen
(b) sulphur dioxide
(c) oxygen
(d) argon