9th Class Science Natural resources Question Bank 9th CBSE Science Natural resources

  • question_answer
      Justify "Dust is a pollutant".

    Answer:

                      Dust is present in air as suspended particles. It can cause allergy and other respiratory diseases. It also affects plant growth by covering stomata on leaf surface and blocking them. It acts as the carrier of toxic compounds like heavy metals. Thus, dust acts as a pollutant.


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