The pollutants from man's activities can radically accelerate the ageing process of a lake known as

  1. Cultural Eutrophication
  2. Accelerated Eutrophication
  3. Biomagnification
  4. Both A and B
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Which of the following is harmful for aquatic organisms?

  1. Thermal wastewaters
  2. Agricultural waste
  3. Industrial waste
  4. All of these
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The prime contaminants of sewage water which act as plant nutrient are

  1. Nitrates and Phosphates
  2. Phosphates
  3. Nitrates, DDT
  4. Cadmium and DDT
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Thermal wastewater

  1. Eliminates or reduces the number of organisms sensitive to high temperature
  2. May enhance the growth of plants and fish in extremely cold areas
  3. Cause damage to the indigenous flora and fauna
  4. All of these
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Integrated waste water treatment means

  1. By utilising only artificial processes
  2. By utilising only natural processes
  3. By utilising both artificial and natural processes
  4. By utilising advanced and more expensive means
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An example of integrated waste water treatment comes from

  1. The town of Arcata along northern coast of California and biologist of Humboldt State University
  2. The town of Bangalore and biologist of Humboldt State University
  3. The town of New York along northern coast of California and biologist of Purdue University
  4. The town of Arcata along northern coast of California and biologist Purdue University
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The integrated waste water management in Arcata

  1. The conventional sedimentation, filtering and chlorine treatment were performed in first stage
  2. To remove dissolved heavy metal the biologist developed a series of 10 connected marshes
  3. Only bacteria were seeded here in marshland
  4. All of these
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The second stage of integrated waste water treatment in Arcata

  1. 6 Marshlands of 60 hectares
  2. Appropriate plants, algae, fungi and bacteria were seeded into this marshland
  3. Such arrangements actually neutralize, absorb and assimilate the pollutants
  4. All of these
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FOAM is

  1. A citizens group called Friends of Arcata Marsh, India
  2. Responsible for the upkeep and safeguarding of integrated waste water management project of Arcata
  3. Comes under Government of India
  4. All of these
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The marshlands of integrated waste water management performs

  1. Sanctuary with a high level of biodiversity in the form of fishes, animals and birds
  2. Appropriate plants, algae, bacteria neutralize, absorb and assimilate the pollutants
  3. Both A and B
  4. Act as ecological sanitation
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