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1 mark

Activated sludge plants are used to reduce

  1. A
    water pollution.
  2. B
    noise pollution.
  3. C
    thermal pollution.
  4. D
    air pollution.

Solution & Step-by-step Explanation

Activated sludge plants are highly efficient secondary wastewater treatment facilities designed to combat water pollution. They utilize biological processes involving a mixture of air and microorganisms to decompose organic matter and eliminate contaminants from sewage or industrial effluents before discharge.

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Activated sludge plants are used to reduce
A
water pollution.
B
noise pollution.
C
thermal pollution.
D
air pollution.

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Water PollutionWastewater TreatmentWaste Management

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