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Portugal
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INFORMATION
 In the same heading
 Water, source of life?Keywords
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Water, source of life?
photo Water, source of life?
The human action, through the substances that it releases to the river or the practices of an intensive agriculture, has led to the growth of both organic and inorganic matter that exists in the water courses. This excess of nutrients causes a large growth of algae and others microorganisms, lowering the available oxygen what's meaning reduction of the quality of the water. This phenomenon is known as eutrophication. The fact that the water is covered by all these decomposed substances makes it difficult to move the oxygen and the entry of sun light disturbing the species which make that their habitat. Daniela Afonso, Joana Lopes, Tiago Damião. Escola Artur Gonçalves, Torres Novas, Portugal. |
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