Which common indoor pollutant can be derived from combustion processes?

The correct choice is carbon monoxide, which is a common indoor pollutant that results from the incomplete combustion of fossil fuels. When fuel sources like gasoline, wood, natural gas, and propane burn in low-oxygen environments, carbon monoxide is produced. This colorless, odorless gas is particularly dangerous, as it can accumulate quickly and lead to severe health issues, including headaches, dizziness, and even death at high concentrations. Monitoring indoor air quality and ensuring proper ventilation in areas where combustion occurs is essential to reduce carbon monoxide levels and minimize health risks.

While radon is a naturally occurring radioactive gas that can accumulate indoors, it is not a product of combustion but rather emanates from soil and rock. Formaldehyde, which can be released from household products like furniture and cleaning agents, is more associated with off-gassing than with combustion processes. Asbestos predominantly originates from certain construction materials and insulation products and is not linked to combustion, making carbon monoxide the clear answer among the given options.