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General Knowledge MCQs – Certification Test 628

Ozone Layer Depletion Quiz (Question 628) – Study App & e-Book Download

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MCQ: 628

Methyl chloroform, carbon tetrachloride, hydro fluorocarbons and chlorofluorocarbons are mainly known as

  1. mesosphere building substances
  2. troposphere building substances
  3. ozone building substances
  4. ozone depleting substances
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