“The combined effects of outdoor and domestic air pollution cause around seven million premature deaths every year due to an increase in cerebrovascular accidents, heart diseases, chronic obstructive pulmonary disease, lung cancer and acute respiratory infections.” At a seminar organised by the Naturgy Foundation in Brussels, the coordinator for Air Pollution and Urban Health at the WHO, Nathalie Roebbel, used these figures to warn of the consequences of air quality in cities.