Reportage on the observatory accredited by the French Ecology, Sustainable Development and Energy Ministry to provide surveillance and information on air quality in the Auvergne-Rh?ne-Alpes area of France. Feyzin industrial area in the suburbs of Lyon, which has been classed a 慡eveso? zone (Seveso zones are dangerous industrial installations that are classed according to the degree of risk they may cause). Air quality measuring station near a stadium and refinery.