For those who are working in laboratories and/or in a way or another being exposed to indoor pollutants, there are guidelines for the exposure to such pollutants. In this document such guidelines for indoor air-quality are given for some selected indoor sources of pollutants (benzene, carbon monoxide, formaldehyde, naphthalene, nitrogen dioxide, polycyclic aromatic hydrocarbons (especially benzo[a]pyrene), radon, trichloroethylene and tetrachloroethylene). These pollutants are known in respect of their hazardousness to health and are often found indoors in concentrations of health concern. For these pollutants information is given for their indoor sources, pathways of exposure, indoor concentrations, indoor–outdoor relationship, kinetics and metabolism, health effects, and health risk evaluations as well as other relavant explanations.

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