Which of the following is NOT a building material that emits formaldehyde?
APlywood
BGlue
CPaints
DConcrete
Answer:
D. Concrete
Read Explanation:
Formaldehyde is a colourless gas with a pungent smell. It is one of the most common volatile organic compounds (VOCs) found indoors.
Formaldehyde is emitted from building materials (e.g. particleboard, plywood, glue, paints) as well as household and personal care products (e.g. drapes, carpets, cleaning products, hair sprays).
Additional indoor sources may be combustion processes such as smoking, heating, cooking, or candle or incense burning.