Biological Oxygen Demand (BOD) is a standard criteria for

Biological Oxygen Demand (BOD) is a standard criterion for -

Which of the following material is biodegradable?

Which of the following is not a biodegradable polluter?

Which one of the following is NOT a reason of decrease in biodiversity?

In case of which one of the following biogeochemical cycles, the weathering of rocks is the main source of release of nutrient to enter the cycle?