What are the factors that are responsible for water pollution. Class 8
Answers
Answer:
Some of the major causes of water pollution are listed below.
Pathogens
One of the most severe pollutants is the disease-causing microorganisms called pathogens. Pathogens are mostly bacteria, virus, and protozoa. Although bacteria are considered harmless if not beneficial, there are a few pathogenic bacteria as well which enter the water bodies through sewers and sanitation systems. The water-borne pathogens cause several diseases such as diarrhoea, gastrointestinal illness, etc.
Organic Wastes
Organic water pollutants include food waste, detergents, leaves, grass, etc. They originate from domestic sewage, discharge from food processing factories and farm wastes which reach the water sources through runoff and pollute them. It is a fact that the bacteria decompose the complex organic matter into the simple organic matter. They consume oxygen which is dissolved in water. As the organic waste content in the water increases so does the count of decomposers. They use up a lot of oxygen which results in the depletion of oxygen content in water. This adversely affects aquatic life.
Chemical Pollutants
Chemical pollutants include heavy metals such as mercury, lead, cadmium, etc., solvents from industries, pesticide run-offs, oil spills through ships, etc. They are poisonous to aquatic life forms and cause their infertility and death. The metal wastes are dangerous to humans as well when they get absorbed in our body. They can damage the nervous system, kidney, etc.
Answer:
Various Causes of 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.
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