Q. 80. A lake having some algae is situated near a farm. A scientist observed sudde increase in the algae in the lake. What might be the reason for this?
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Some algal blooms are the result of an excess of nutrients (particularly phosphorus and nitrogen) into waters and higher concentrations of these nutrients in water cause increased growth of algae and green plants. ... With more food available, the bacteria increase in number and use up the dissolved oxygen in the water.
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