Sources of Metals MCQ App | Marine Pollution MCQ e-Book PDF

Marine Pollution MCQs (University Level) From Textbook

Marine Pollution MCQs – Certification Test 35

Sources of Metals MCQ (Question 35) – App & e-Book Download

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MCQ 35: About 0.25-0.5 ppm of 'cadmium' is originated from;:

  1. Volcanoes
  2. Coal burning
  3. Fire
  4. dust fibers

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