Pollution of lakes and rivers affects aquatic life. Fish cannot live in water that has oxygen less than $4$ milligrams per liter. Other freshwater aquatic life (including anaerobic bacteria) also cannot survive without adequate oxygen. 'BOD' stands for:

Biological oxygen demand

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Bacterial oxygen deficit

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Basic oxygen demand

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Building oxygen deposits

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Solution

The correct option is B Biological oxygen demand
BOD stands for Biological Oxygen Demand is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a given water sample at a certain temperature over a specific time period.

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Similar questions

Biochemical oxygen demand is a measure of organic material present in water. BOD value less than 5ppm indicates a water sample to be ___________.

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