How to rivers get polluted
How to rivers get polluted? Write down the measures to be taken to prevent the pollution.
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Chemical waste products from industrial processes are sometimes accidentally discharged into rivers. Examples of such pollutants include cyanide, zinc, lead, copper, cadmium and mercury. ... Dirty water containing chemicals is put back in the river. Water used for cooling is warmer than the river itself.
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If large amounts of fertilizers or farm waste drain into a river the concentration of nitrate and phosphate in the water increases considerably. Algae use these substances to grow and multiply rapidly turning the water green. This massive growth of algae, called eutrophication, leads to pollution.
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