Trends of air pollutant concentrations that influence the incidence of respiratory diseases
and might be influential for respiratory hypersensitivity are presented and discussed. Data
for these trends are collected in UNEP/WHO's Global Environmental Monitoring System
GEMS/Air which recently has been revitalized and redirected to become a tool for providing
the information necessary for rational air quality management. Data are interpreted with
respect to who's most recent air quality guidelines, which are an update of the air quality …