World Geography
The thickness of biosphere is

5-8 km above the earth's surface
10-12 km above the earth's surface
5-10 km above the earth's surface
8-10 km above the earth's surface

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World Geography
The Harmattan is

tertiary wind that carry great quantities of fine dust from the Sahara
cool, extremely dry wind that forms over the Sahara and blows westward or south-westward to the Af
wind that blows during the dry season from December to February
All of these

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World Geography
Which among the following statements is/are correct about the stratosphere?The Stratosphere is the layer of the Earth’s atmosphere which lies beyond the mesosphere.It extends up to an altitude of 50 kilometres from the earth’s surface.This layer is ideal for flying aeroplaneSelect the correct code from the options given below:

Only 1 & 2
1, 2 & 3
Only 2 & 3
Only 1

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