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Examines in Marine Biology & Oceanography

Water: Vital for Subsistence

  • Open or Close Pragya Khanna*

    Govt (Autonomous) College for Women Parade Ground, India

    *Corresponding author: Pragya Khanna, Assoc. Professor in Zoology, Govt. (Autonomous) College for Women Parade Ground, Jammu-180 001 (J&K) India, Email:

Submission: January 20, 2018; Published: February 01, 2018

Volume1 Issue2
February 2018


The earth seems to be quite distinct among the other known celestial bodies as it has one important component that is water which covers three-fourths of its surface. This water is absolutely essential for the survival of all the life on this planet. However, the truth is that it not given due credibility that it is worthy of unfortunately, while there is a lot of water on the earth, relatively little is actually available for drinking and other human uses. Of all the water on the earth, 97% of the water on earth is in the oceans therefore not readily available for daily human needs, the 3% of the water on earth is freshwater and out of that about 2.4% of the water is permanently frozen in glaciers and at the polar ice caps, about 1/2 of the remaining 0.6% is groundwater and only about 1/100 of 0.6% of the water on earth is in the rivers and lakes that is readily accessible and generally used. A well recognized fact is that a person can live about a month without food, but can live only about one week without water.

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