What happens when the maximum amount of oxygen in the upstream of sewage discharge is utilized by microbes?

What happens when the maximum amount of oxygen in the upstream of sewage discharge is utilized by microbes?

Q. What happens when the maximum amount of oxygen in the upstream of sewage discharge is utilized by microbes?

  1. Natality of aquatic plants
  2. Natality of aquatic fishes
  3. Mortality of aquatic creatures
  4. Mortality of bacteria

Answer: Mortality of aquatic creatures

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