River pollution causing severe algal bloom

River pollution causing severe algal bloom

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Credit: G. FONTAINE, PUBLIPHOTO DIFFUSION/SCIENCE PHOTO LIBRARY

Caption: Algal bloom. View of a blue-green algal bloom discolouring the water of a polluted river. The water has turned bright green and dark-brown pollutants are also seen near the river banks. Algal blooms occur due to abnormal growth of algae. This growth is usually due to polluting phosphorus or nitrogen, from sewage effluent or agriculture, leaking into rivers, lakes or seas. Some of these algae liberate toxins harmful to fish, aquatic birds and humans. Algal blooms may also cause eutrophication (oxygen depletion) in bodies of water resulting in large scale death of animal and plant species.

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Keywords: algae, algae bloom, algal bloom, blue-green algae, cyanobacteria, environment, environmental, pollution, river, river pollution, water, water pollution

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