What are the major causes of water pollution? Explain

1.	What are the major causes of water pollution? Explain
Answer» 1. Pathogens: These are water pollutants include bacteria and other organisms. They enter water from animal excreta and domestic Sewage. Bacteria presents in human excreta causes gastrointestinal diseases (Excreta contains, Escherichia Coli and streptococcus faecalis ) 2. Organic wastes: These are biodegradable water that pollutes water as a result run off. The presence of excess of organic wastes in water decreases the amount of oxygen held by water. This decrease in the amount of dissolved oxygen inhibits aquatic life. 3. Chemical pollutants: These are the water soluble chemicals like heavy metals such as cadmium, mercury, nickel etc… The presence of these chemicals (above the tolerance limit) can damage the kidneys, central nervous system and liver.

Answer»

1. Pathogens: These are water pollutants include bacteria and other organisms. They enter water from animal excreta and domestic Sewage. Bacteria presents in human excreta causes gastrointestinal diseases (Excreta contains, Escherichia Coli and streptococcus faecalis )

2. Organic wastes: These are biodegradable water that pollutes water as a result run off. The presence of excess of organic wastes in water decreases the amount of oxygen held by water. This decrease in the amount of dissolved oxygen inhibits aquatic life.

3. Chemical pollutants: These are the water soluble chemicals like heavy metals such as cadmium, mercury, nickel etc… The presence of these chemicals (above the tolerance limit) can damage the kidneys, central nervous system and liver.

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