Why Water is Essential for Human Survival

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Water – is the most constant and is an indispensable component of our daily life. No household operation could not be carried out without water.

Water can be used in many ways: for domestic purposes, for industrial purposes, in agriculture, and for power plants and many more.

In domestic purposes water is consumed for drinking, cooking , washing, bathing , flushing sewage into drains and irrigation of gardens and streets. It is consumed that about 8 % of the water is used for domestic purposes by mankind.

Over 85% of the water used for industrial purposes, is consumed in cooling. The rest is consumed in washing, scrubbing , and for hydraulic solvent . Approximately half a million liters of water is used to produce each car ; this includes the amount of irreversibly expended as water and water reuse. In industrial applications consumes about 22 % of all water used in the world .

Agriculture accounts for 70% of water consumption worldwide. This water is used for irrigation. For one ton of cotton growing need 11,000 million liters of water . For growing ripe pumpkin requires 150 liters of water.

Water is used for hydropower and thermal power plants , steam generation , rotating turbine and for cooling purposes . Although power consumes huge amounts of water , it is used almost without losses , in a closed loop . It is estimated that in the middle of the twenty -first century, water consumption worldwide will exceed its natural flow . To solve this problem , different ways of getting fresh water are developed.

Sources of water pollution can be physical, biological , chemical, thermal and radiological contaminants.

• Physical pollution - the increase of insoluble impurities in water (sand, clay, silt ) by run-off of rainw...

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