Answers

  • Brainly User
2015-01-18T12:38:25+05:30
IT is the BOD level.It is the presence of organic matter in the water. If the water has high BOD level means there are more organic material present in it... thus reducing oxygen to organisms in water like fish because the organic matter uses oxygen to decompose...... 
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its wrong
what???????
is wrong........
tell me what is wrong?????