Over the past several decades, air pollution in residential buildings has become a matter of
increasing concern. Pollutants, such as formaldehyde and acetaldehyde are emitted into indoor air
from the building materials and the construction products (Wanner, 1993). There has been an
increasing focus on formaldehyde, in particular, in view of cancer and asthma. A recent extensive
review (Arts et al., 2006) and study of asthmatics (Ezratty et al., 2007) both show that the risk is minimal regarding the health effects.