Q23 of 56 Page 79

An increase in carbon dioxide content in the atmosphere would not cause

If CO2 level will increase temperatures throughout the Earth. However, soil conditions will not necessarily favor growth of dry land plants.

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21

Total earth’s surface covered by water is

 22

Biotic component of biosphere is not constituted by

 24

Oxygen is returned to the atmosphere mainly by

 25

Low visibility during cold weather is due to