Definition

96.5 per cent of the total volume of world’s water is estimated to exist as oceans and only 2.5 per cent as freshwater.
Nearly 70 per cent of this freshwater occurs as ice sheets and glaciers in Antarctica, Greenland and the mountainous regions of the world, while a little less than 30 per cent is stored as groundwater in the world’s aquifers.
India receives nearly 4 per cent of the global precipitation and ranks 133 in the world in terms of water availability per person per annum.
The total renewable water resources of India are estimated at 1,897 sq km per annum.
By 2025. it is predicted that large parts of India will join countries or regions having absolute water scarcity.

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