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Why is there a shortage of water even though it occupies about 71% of the earth’s surface?

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1. 71% of earth’s surface is covered with water of, which 97% is salty water present in seas and oceans and 2.7% water is available as ground water, ice and in other forms.

2. Only 0.3% water is available as fresh water which can be used for drinking.

3. All the living organisms require water to drink. The water is used in the industry and also for farming.

4. Due to increasing population and uncontrolled usage, we experience shortage of water.

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