UPSC Prelims 2017 · GS Paper 1 · Q59
Environment
Easy · Water Pollution: Biological Oxygen Demand (BOD)
Biological Oxygen Demand (BOD) is commonly used as a standard criterion for assessing which of the following?
UPSC Prelims 2017 · GS Paper 1 · Q59
Easy · Water Pollution: Biological Oxygen Demand (BOD)
Biological Oxygen Demand (BOD) is commonly used as a standard criterion for assessing which of the following?