Timeactivity diaries kept by members of the general public indicate that on average people spend around 90% of their time indoors, this is associated with considerable exposure to air pollutants as not only is there infiltration of pollutants from outdoors, there are also emissions indoors that can lead to elevated pollutant concentrations. Despite this, and the fact that the WHO produces air quality guidelines for indoor air, the only statutory requirements for monitoring of airborne pollutant concentrations relate to the outdoor environment. Given its importance as a source of air pollution exposure, increasing attention is being given to pollution of the indoor environment.

This volume considers both chemical and biological pollutants in the indoor atmosphere from their sources to chemical and physical transformations, human exposure and potential effects on human health. It is a valuable reference for those working in in environmental policy, civil and environmental engineering as well as for atmospheric chemists.

The series has been edited by Professors Hester and Harrison since it began in 1994.

Professor Roy Harrison OBE is listed by ISI Thomson Scientific (on ISI Web of Knowledge) as a Highly Cited Researcher in the Environmental Science/Ecology category. He has an h-index of 84 (i.e. 84 of his papers have received 84 or more citations in the literature). In 2004 he was appointed OBE for services to environmental science in the New Year Honours List and in 2017 was elected a Fellow of the Royal Society. He was profiled by the Journal of Environmental Monitoring (Vol 5, pp 39N-41N, 2003). Professor Harrisons research interests lie in the field of environment and human health. His main specialism is in air pollution, from emissions through atmospheric chemical and physical transformations to exposure and effects on human health. Much of this work is designed to inform the development of policy.

Now an emeritus professor, Professor Ron Hester's current activities in chemistry are mainly as an editor and as an external examiner and assessor. He also retains appointments as external examiner and assessor / adviser on courses, individual promotions, and departmental / subject area evaluations both in the UK and abroad.

Indoor Sources of Air Pollutants;Outdoor Air as a Source of Indoor Pollution; Chemical and Physical Properties of Indoor Aerosols; Indoor Emissions as a Source of Outdoor Pollution; Chemical Reactions in the Indoor Atmosphere; Biological Particles in the Indoor Environment; Indoor Air as a Contributor to Air Pollution Exposure; Health Effects of Indoor Air Pollution