Write a note on the importance of water class 7
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THE IMPORTANCE OF WATER
With two thirds of the earth's surface covered by water and the human body consisting of 75 percent of it, it is evidently clear that water is one of the prime elements responsible for life on earth. Water circulates through the land just as it does through the human body, transporting, dissolving, replenishing nutrients and organic matter, while carrying away waste material. Further in the body, it regulates the activities of fluids, tissues, cells, lymph, blood and glandular secretions.
An average adult body contains 42 litres of water and with just a small loss of 2.7 litres he or she can suffer from dehydration, displaying symptoms of irritability, fatigue, nervousness, dizziness, weakness, headaches and consequently reach a state of pathology. Dr F. Batmanghelidj, in his book 'your body's many cries for water', gives a wonderful essay on water and its vital role in the health of a water 'starved' society. He writes: "Since the 'water' we drink provides for cell function and its volume requirements, the decrease in our daily water intake affects the efficiency of cell activity........as a result chronic dehydration causes symptoms that equal disease..."
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Lifestyle of the inhabitants and their economic conditions affect the water use within the home in different parts of the country. Municipal; demand includes water for domestic purposes, commercial uses, street washing, lawn and garden irrigation, fire protection.
Water in the domestic sector is generally used for drinking, washing toilets, lawn sprinkling, and food preparation etc.
Water in the domestic sector is generally used for drinking, washing toilets, lawn sprinkling, and food preparation etc.
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