<div>Which of the following chemical is released by chlorofluorocarbon that is harmful to ozone ?</div></…

BOD refers to</h2></div>

Who enhances the degradation of ozone?

Biological Oxygen Demand (BOD) of sewage water is related to <span><br> </span></h2>&lt…

Which of the following is an example of freon ?</h2></div>

A water body has high BOD, indicating that water is</h2></div>

What is important to support marine animals in water bodies?<span><br> </span></h2></div>

BOD of a pond is related to .......... in per unit volume of water.</h2></div>