Hyderabad, July 28: Industrial effluents, excessive use of pesticides, population explosion and domestic sewerage are the four most important reasons for increase in the level of pollution in the city, observed B Madhusudana Rao, joint chief environmental engineer with the state Pollution Control Board (PCB) on Saturday. Rao was delivering the key note address during a workshop on 'new and renewable energy and its applications' organized by the board's cleaner production cell.
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