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Free "Class 7 Geography" App Download [Free] with MCQ: Way in which plants die because of dropped level of oxygen is classified as; with answers: allotrophication, eutrophication, oxygenation, and de-oxygenation to study distance learning courses. Solve Types of Pollution MCQ Questions, download Google e-Book (Free Chapter) for online education.

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MCQ 21: The way in which plants die because of dropped level of oxygen is classified as:

  1. eutrophication
  2. allotrophication
  3. oxygenation
  4. de-oxygenation

MCQ 22: The addition of harmful substances that has bad effects on environment and living things is classified as:

  1. allotrophication
  2. eutrophication
  3. atmospheric pressure
  4. pollution

MCQ 23: The poisonous substances that can be present in industrial wastes does not includes:

  1. phosphates
  2. nitrates
  3. mercury and lead
  4. oxygen

MCQ 24: The Kyoto Protocol agreement was signed in:

  1. 1997
  2. 1990
  3. 1985
  4. 1980

MCQ 25: The document that was drafted by India, Brazil, China, United States and South Africa at meeting under UNFCCC is classified as:

  1. Greenhouse Accord
  2. United Nation Accord
  3. Copenhagen Accord
  4. Denmark Accord

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Internal Structure of Earth MCQs
Air and Water Pollution MCQs
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Water Resources and Management MCQs
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The Land MCQs
Movement of Earth MCQs
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