Question

Among the following which one causes more indoor chemical pollution?

• A. Burning coal
• B. Burning cooking gas
• C. Burning mosquito coil
• D. Room spray

Answer 1

Answer: (A)

Burning coal

Answer 2

Among the given four options, both burning of coal and burning of mosquito coil will cause chemical pollution, but burning of coal will cause more pollution. The main ingredient in mosquito coils is pyrethrum $C$ (a natural extract from the Chrysanthemum flower). At high doses, it is responsible for various respiratory disorders. The coal leads to release of a wide array of air pollutants ($COx$, $SOx$, $NOx$, etc.). Among these, $CO$ is very dangerous, it interfer with breathing process. People are generally advised not to sleep with coal burning in the closed room.