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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 6

About 71% of earth’s surface is covered with water, then why do we face scarcity of water? - Science

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Question

About 71% of the earth’s surface is covered with water, then why do we face scarcity of water?

Answer in Brief
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Solution

About 71% of the earth’s surface is covered with water and even then we face scarcity of water.

Reasons: 

  1. 97% of total water is found in seas and oceans, which is salty and not fit for human consumption.
  2. Only 3% found in the freshwater and that too available in polar ice caps and glaciers.
  3. Out of 3% freshwater, only 0.3% is available to us as surface water, in lakes, rivers, and swamps.
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Chapter 2: Water - Evaluation [Page 29]

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Samacheer Kalvi Science - Term 3 [English] Class 6 TN Board
Chapter 2 Water
Evaluation | Q VIII. 3. | Page 29
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