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Secondary Sector : Industry — Economics STD 9 — Question

ICSE BoardEnglish MediumSTD 9EconomicsSecondary Sector : Industry1 Mark
MCQ
Mining releases _________ .
  • A
    Dust
  • B
    Smoke
  • C
    $CO_2$
  • ✓
    All of these
✓

Answer

Correct option: D.
All of these
d

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