essay on water pollution about 200 words
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Answer:
The level of fresh drinking water is becoming less day by day on the earth. There is a limited availability of drinking water on the earth however that too is getting polluted because of human activities. It is tough to estimate the possibility of life on the earth in the absence of fresh drinking water. Water pollution is the mixing of foreign substances by means of organic, inorganic, biological and radiological in the water degrading the quality and usefulness of water.
Hazardous pollutants may contain various types of impurities including harmful chemicals, dissolved gases, suspended matters, dissolved minerals, and even microbes. All the contaminants reduce the level of dissolved oxygen in the water and affecting the lives of animals and human beings to a great extent. Dissolved oxygen is the oxygen present in water required by the aquatic system to continue the lives of plants and animals. However biochemical oxygen is the demanded oxygen by the aerobic micro-organisms to oxidize organic matters of wastes.
Water pollution is caused by two means, one is natural water pollution (due to the leaching of rocks, decay of organic matters, decay of dead matters, silting, soil erosion, etc) and another one is man-made water pollution (due to the deforestation, set up of industries near large water bodies, high level emission of industrial wastes, domestic sewage, synthetic chemicals, radio-active wastes, fertilizers, insecticides, pesticides etc).
Answer:
Water pollution
Water is an essential natural element that helps humans to survive on Earth. Our body constitutes 60 percent of water.
Water pollution is linked to the word contamination. It refers to the presence of impurities and harmful elements in the water. The polluted water is not fit for drinking and is harmful to living beings such as animals, birds, and human beings. Water pollution is a source of many deadly diseases that cause harm, diseases, and even kill human civilization.
Water pollution leads to the destruction of the environment and all of its components. We need clean water for our survival, and it is our responsibility to conserve it.
>>>>> Reasons for water pollution
•Industrial Waste.
•Sewage and Wastewater.
•Mining Activities.
•Marine Dumping.
•Accidental Oil Leakage.
•The burning of fossil fuels.
•Chemical fertilizers and pesticides.
•Leakage From Sewer Lines.
√ We need to perform sewage treatment
Stage 1: Screening
Stage 2: Primary treatment
Stage 3: Secondary treatment
Stage 4: Final treatment