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Question : Two yearsago,the lakewas pure ,cleanand richin varietyof organism while nowit iscolourless ,richin algaeand have a dirty smell .Namethe pollutantsand phenomenon . |
| Answer» SOLUTION :The POLLUTANTS arephosphaticand nitrogeneous inor-organicfertilisers .The phenomenonis calledeutrophi- CATION. | |