Biology, asked by kvsuperman, 7 days ago

can u please help me with any of the questions

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Answered by borhaderamchandra

1

Answer:

4. =3%

5. Biological Oxygen Demand

6. blue and irritating smell

7.= chloroflurocarbon

Answered by naveenverma2920

1

4= 70% fresh water is on earth

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