The Building Engineering Services Association (BESA) has welcomed tough new air quality targets contained in updated World Health Organisation (WHO) guidelines but stressed the need for indoor targets to be practical and affordable....
In its first update to air quality guidelines since 2005, the WHO blamed exposure to pollution for seven million premature deaths a year worldwide. It slashed the recommended maximum levels for several pollutants, including particulate matter (PM) and nitrogen dioxide (NO2) saying there was “clear evidence” that air pollution harmed human health “at even lower concentrations than previously understood”.