Human Activities and Ecosystem MCQs App (iOS & Android) – Class 8 Science e-Book PDF

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Class 8 Science MCQs – Certification Test 166

Human Activities and Ecosystem MCQs (Question 166) – App & e-Book Download

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MCQ 166: The harmful substances which damage the environment are called:

  1. pollutants
  2. compounds
  3. gases
  4. waste material
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Class 8 Science MCQs App & e-Book – Human Activities and Ecosystem Certification Guide

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