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Air and Atmosphere — CHEMISTRY STD 7 — Question

ICSE BoardEnglish MediumSTD 7CHEMISTRYAir and Atmosphere1 Mark
MCQ
The humans pollute the air by :
  • A
    burning a vast amount of coal
  • B
    burning waste materials
  • C
    using petrol and diesel vehicles
  • ✓
    all the above
✓

Answer

Correct option: D.
all the above
all the above

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