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Natural Resources — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceNatural Resources1 Mark
Question

SPM includes:

  1. Flyash.
  2. Dust.
  3. Soot and smoke.
  4. All the above.
✓

Answer

  1. All the above.

Explanation:

Suspended Particulate Matter (SPM)are finely divided matter particles that cause aur pollution. They may be dispersed into air by combustion or industrial processes. Dust, soot and smoke, flash are all Suspended Particulate Matter.

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