जलीय संसाधनों के प्रदूषण के कारणों और परिणामों तथा सांस्कृतिक यूट्रोफिकेशन की समस्या का विवरण दें। जल क्षय की रोकथाम के उपाय सुझाएं। (Give an account of causes and consequences of pollution of aquatic resources and the problem of cultural eutrophication. Suggest measures for the abatement of water degradation.) (UPSC 2015,15 Marks,)

Give an account of causes and consequences of pollution of aquatic resources and the problem of cultural eutrophication. Suggest measures for the abatement of water degradation.