Which of the following is not a source of Indoor air pollution?: (A) Carbon monoxide, (B) Nitrogen dioxide, (C) Radon, (D) Mercury vapour
Answer is D. Sources of Indoor air pollution: Indoor air pollutants Sources Respirable paicles Tobacco, smoke, stove, aerosols Carbon monoxide Combustion equipments, stove, gas, heaters Nitrogen dioxide Gas cookers, cigarettes Sulphur dioxide Coal combustion Carbon dioxide Combustion, respiration Formaldehyde Paicle board, carpet adhesives, insulation Organic vapours (benzene, toulidine) Solvents, adhesives, resins, aerosols Ozone Electric aecing, UV light Radon Building materials Asbestos Insulation, fire-proofing Mineral fibers Appliances