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The principal indoor air quality problem in households burning biomass for cooking is

  • A.Elevated radon
  • B.Formaldehyde from furnishings
  • C.Ozone from electrical equipment
  • D.Fine particulate and carbon monoxide

Answer: D

Correct answer: Fine particulate and carbon monoxide

Burning wood, dung or crop residue on an unvented stove releases both in large quantities into the room, and kitchen concentrations of fine particulate reach hundreds or thousands of micrograms per cubic metre - far above any ambient standard.

The exposure falls on women and small children, who are present during cooking, and it is among the largest environmental health burdens worldwide. Radon comes from soil, formaldehyde from furnishings and ozone from equipment; none is the biomass problem.

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