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                      About importance of water.

About importance of water.

 Water is one of the most important natural resources. It is the most essential resource that supports all forms of life. Three-fourth of the Earth's surface is covered with water in the form of oceans, seas, rivers, ponds, lakes, underground water and ice in the polar regions.

 About 97 per cent of water is present in oceans. But it is saline water.

Only 3 per cent of the water present on Earth is fresh water. Underground water is the most important source of drinking water for us, but its exhaustive use has led to a great fall in its levels. Moreover, pollution and disposal of waste materials and sewage water has led to great deterioration of the quality of water and has made it unfit for drinking.

All the materials present around us makes life possible on Earth are called resources. The resources which exist naturally on Earth are called natural resources such as water, air, animals and plants. Natural resources are of two types. The natural resources which are living like plants and animals are called living natural resources. The natural resources which are non-living are called non-living natural resources like air, water, soil, minerals, etc.

Water is one of the most essential materials required for life. One cannot survive without water. If we do not drink water for few hours, our throat becomes dry and we start feeling uneasy. The same is true for plants and animals. Water is an important constituent of our body. The human body is about 65-70 per cent water. We digest our food with the help of water. Waste from our body is removed in the form of urine and sweat which are water based. Water helps us to keep a steady body temperature through evaporation of sweat from the surface of our body. Besides all this, we use water to wash, bathe, clean and cook and for generating electricity. It is also used in industries and agriculture. A plant's body is approximately 60 to 65 per cent water. Plants use water to transport food and nutrients from their roots to each corner of their body and vice versa. Plants use water and carbon dioxide and convert them into glucose (food) in the presence of sunlight by the process called photosynthesis. Water is also used in the germination of seeds.

 Water is also a habitat of millions of aquatic plants and animals. Similar to humans, animals also contain large amount of water in their bodies. A greater number of organisms live in oceans and seas than on land. Water keeps evaporating from the various water bodies, condenses and falls as rain. This continuous cycle is essential for all living organisms.

 Apart from use in our everyday life, water has various other uses:

Water is also used as a means of Paper mill Agriculture transportation. Giant ships move in oceans to carry raw materials and other goods across the world.
   Agriculture requires huge amount of water. There will be no crops without water.

 Water is used to generate electricity. This is known as hydropower.

In our body, our brain is 70 percent water, our blood is 83 percent water and our lungs are 90 per cent water. Various industries such as paper industry, petroleum refineries, cloth industries, chemical industries require water.

  What are source of water


When water vapour in the sky condenses, it rains. Rainwater is one of the purest forms of water. It does not contain impurities but it may contain dust particles and some dissolved gases like carbon dioxide. Rain in polluted cities contains some harmful gases, which can make rain acidic.

Surface Water

 Surface Water collected in streams, rivers, lakes, ponds, etc., is called surface water. Surface water is naturally replenished by precipitation. This water contains suspended impurities and dissolved salts. This also contains many other undesirable substances called pollutants such as sewage and other industrial wastes. Therefore, it is not fit for drinking. It can be used for drinking purpose after appropriate treatment.


Seawater is saline. It contains dissolved salts which are brought by the rivers and rocks in the oceans. This water is unfit for drinking, washing, industrial and agricultural use.

 What is Groundwater?


 What is Groundwater?

 Rainwater and water from water bodies such as rivers, ponds, lakes and streams pass through the soil to rocks lying beneath the ground. As these rocks are non-porous, water collects there and this is called groundwater and the level of this water is called the water table. This underground water sometimes comes out of the land in the form of streams called natural springs. Groundwater is commonly used for agriculture and drinking purposes by digging wells or tube wells. This water contains dissolved salts but is free from suspended impurities as when this water passes through the soil, these impurities get separated.

 What is the rain harvesting?

                             rain harvesting

 What is the rain harvesting?

Rainwater Harvesting One of the best ways to increase the availability of underground water, which is our main source for drinking water and the water used for agriculture, is to collect rainwater and store it for later use. Collecting of rainwater in this process is known as rainwater harvesting. In this, the rainwater is collected where and when it falls, and is prevented from flowing into the rivers. If the rainwater falls in places that are mostly covered with concrete roads and buildings it flows down to drains and then to rivers. This water does not replenish the underground water. A lot of effort is required to get this water back into our homes as water did not seep into the ground. 

Therefore, rainwater harvesting is especially needed in cities where the rainwater usually flows into the drains. Therefore, in such places, two major techniques are used to save rainwater. Firstly, rainwater is collected on the rooftop in a storage tank. This water is sent through pipes or directly to pits in the ground. This then seeps into the ground water. Secondly, rainwater is allowed to go into the ground directly from the roadside drains that collect rainwater.

How to conserve the water?
Conserve water.

How to conserve the water?

 Only a small fraction of water available on the Earth is fit for use by plants and animals Most of the water cannot be used directly. The level of the groundwater is decreasing drastically. The number of people using water is increasing with a rapidly growing population. Also, more and more water is being used by the industries for the various purposes. Hence, it is very important that water is used carefully and its wastage is to be prevented.

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