title: Establishment of air quality standards. Definition of the first effects of air pollution.
mesh_terms: D000220:Adaptation, Biological; D000222:Adaptation, Physiological; D000397:Air Pollution / Q000032:analysis / Q000517:prevention & control*; D000398:Air Pollution, Radioactive / Q000517:prevention & control; D001681:Biological Assay; D003214:Conditioning, Classical; D004781:Environmental Exposure; D004782:Environmental Health; D007390:International Agencies; D007878:Legislation as Topic; D009832:Olfactory Nerve / Q000187:drug effects; D012018:Reflex; D012140:Respiratory Tract Diseases / Q000209:etiology; D014944:World Health Organization