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New Delhi, Sep 29 (ANI): Union Minister for Health and Family Welfare Dr Harsh Vardhan inspected ongoing beautification work of 'Naini Lake' in the national capital on September 29. Naini Lake is a waterbody which is situated in the middle of the bustling Model town in north Delhi. Recently, a team from National Environmental Engineering Research Institute collected a water sample from the lake to check its Biological Oxygen Demand (BOD) level for the survival of aquatic life.