Сборник международной научно-практической
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Сборник зимней школыы 2019
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Key words: Oxygen, earth, routine, drink, perscentage, clean water, under the ground, polluted, worth, mineral, sources, fertilizers, insecticides, herbicides, detergents. Introduction There are three things (oxygen, water and food) without which we cannot live on the oxygen. But the most precious thing is oxygen, then water and food because we cannot live without oxygen even for a second. Clean water is also a most important thing as we need it in our all the daily routine activities and especially to drink. Already the percentage of clean water was less but due to the industrial activities our clean water under the ground is getting dirty and polluted. Because of the lack of fresh mineral water everywhere, it has been started selling on the local shops for many years. And, people are ready to buy it worth 30 to 35 Rs because they know that simple tap water may not be clean especially at the public places. Save water. Increasing rate of people’s carelessness (regarding water saving and safety) and population, it is sure that our future generations must suffer the shortage of clean water. Very less percentage of earth’s water is suitable for drinking and many people (at the place of water shortage) survive on very less water per day. Percentage of Clean Water .Three-fourth of the earth is covered by water from which 97% water is ocean water means salt water and completely unfit for our consumption. Left percentage (about 2.7 percent) is fresh drinking water however around 70 percent of this is available as ice sheets and glaciers in Antarctica. So, we only have one percent of fresh water which is fit for human use. We need to practice water conservation on urgent basis in order to make the presence of this precious resource in our life. We also need to stop contaminating the drinking water resources through direct passage of sewage, toxic chemicals and other wastes into it. Increasing rate of population, deforestation and rapid urbanization is increasing the need of clean water and leading to the water pollution and scarcity. 80 Sources making Clean Water Dirty the sources which are polluting the underground water are land runoff, drainage, seepage, sewage, atmospheric deposition, precipitation, industrial waste, etc. Such wastes get deposited into lakes, rivers, coastal waters, wetlands, etc and meet to the large water bodies and ground water too. Other water spoiling sources are use of excess fertilizers, insecticides, herbicides, detergents, soaps, etc from agricultural lands and residential areas. Acid drainage from abandoned mines and industries involved in making oil, grease and toxic chemicals are also involved in making water dirty and polluted. Such nonpoint sources are the leading cause of water quality problems. жүктеу/скачать 11,88 Mb. Достарыңызбен бөлісу:
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