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1-Industrys and factorys near the river pollutes the river by discharging waste and harmfull chemicals which can contaminate the water and be very harmfull to fish and marine life and can cause mutatations and kill the marine life.
sources of water pollution
1-Industrys and factorys near the river pollutes the river by discharging waste and harmfull chemicals which can contaminate the water and be very harmfull to fish and marine life and can cause mutatations and kill the marine life.
2-untreated sewage is dicharged into river which pollutes the river and causes diseases such as malaria to spread and can kill fishes and people.
3-fertilisers and harmfull ions such as nitrate ions enter the river by leaching by the rain and so this causes algae to grow and take all the sunlight and kill plants at the bootom of the river bacteria come to decompose the dead matter and use up oxygen by respirtion and the fish die due to a lack of oxygen
2-untreated sewage is dicharged into river which pollutes the river and causes diseases such as malaria to spread and can kill fishes and people.
3-fertilisers and harmfull ions such as nitrate ions enter the river by leaching by the rain and so this causes algae to grow and take all the sunlight and kill plants at the bootom of the river bacteria come to decompose the dead matter and use up oxygen by respirtion and the fish die due to a lack of oxygen
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