Biological oxygen demand (BOD) is a standard criterion for :

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Q: 3 (IES/2014)
Biological oxygen demand (BOD) is a standard criterion for :
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question_subject: 

Science

question_exam: 

IES

stats: 

0,87,26,12,10,87,4

keywords: 

{'biological oxygen demand': [0, 0, 0, 3], 'oxygen levels': [0, 0, 0, 2], 'computing oxygen levels': [0, 0, 0, 2], 'bod': [1, 0, 0, 3], 'pollution': [3, 0, 1, 0], 'aquatic systems': [0, 0, 0, 1], 'forest ecosystems': [0, 0, 0, 2], 'high altitude regions': [0, 0, 0, 2], 'blood': [5, 0, 0, 1], 'standard criterion': [0, 0, 0, 1]}