BOD (Biological Oxygen Demand) is a measure of

The amount of oxygen required for biochemical decomposition process is called:

Water pollution of river is measured by:

Which of the following air pollutants gets dissolved in haemoglobin of the blood more rapidly than oxygen?

With reference to Eutrophication, which of the following statement(s) is/are correct? 1. It decreases dissolved oxygen of water. 2. It is a phenomenon of nutrient enrichment of a water body. Select t…

Ozone layer of upper atmosphere is being destroyed by which of the following?