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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

Air and Water Pollution MCQs App & e-Book – Class 7 Geography Competitive Exam

Internal Structure of Earth MCQs
World Population and Resources MCQs
Settlements MCQs
Map Skills MCQs
Water Resources and Management MCQs
Air and Water Pollution MCQs
Transport and Communications MCQs
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