Public health awareness on indoor air pollution has lagged
behind that on outdoor air pollution. However, air quality inside
public and private buildings where people spend a large part of
their life is an essential determinant of healthy life and people’s
welfare. Evidence has been made that people, especially children,
spend most of their time in indoor environments and therefore are
more exposed to indoor air pollution (Almeida et al., 2011). Whilst
this does not per se mean that indoor exposures will produce more
harmful effects, the evidence is that indoor concentrations of many
air pollutants are often higher than those typically encountered
outside (Jones, 1999).