The consequences of global warming may be _________.
(i) increase in average temperature of the earth
(ii) melting of Himalayan Glaciers.
(iii) increased biochemical oxygen demand.
(iv) eutrophication.


Answer: Options (i), (ii)
Solution:
About 75% of the solar energy reaching the earth is absorbed by the earth’s surface, which increases the temperature. The rest of the heat radiates back to the atmosphere.
The average global temperature will increase to a level which may lead to melting of polar ice caps and flooding of low lying area all over the earth. Increase in the global temperature increases the incidence of infectious diseases like dengue, malaria, yellow fever, sleeping sickness etc.
Hence, correct options are (i) and (ii).

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