Biological Oxygen Demand or BOD increases with increase in water pollution. In this refernce, answer the questions that follows
(i) At a particular segment of the river near a sugar factory, the BOD is much higher than the normal level. What is it indicative of?
(ii) What will happen to the dissolved oxygen and living organisms in the part of the river?

Explanation

(i) It indicates that the sugar factory releases organic waste in the water body. To degrade the organic matter, microbes utilise the dissolved oxygen in the water, thereby, reducing the level of dissolved oxgyen and increasing the BOD.
(ii) In this part of river, the dissolved oxygen will be depleted making it difficult for aquatic species to survive. It can result in death of fishes in severe cases.