Air pollution can result in emphysema,which is:

  • A
    Chronic damage to air sacs or alveoli leading to abnormal reduction in respiratory surface area.
  • B
    Persistent inflammation and damage to the cells lining the bronchi and bronchioles.
  • C
    An allergic reaction causing muscle spasms in the bronchial walls.
  • D
    Damage to any lung tissue causing increase in elasticity of the air sacs.

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