The average level of fine particulates should be reduced by at least three micrograms per metre cubed as a yearly average if we are to see a significant reduction in mortality caused by these particulates. This is the conclusion of a interdisciplinary study led by researchers from Inserm, the CNRS, INRA, Atmo Auvergne Rhône-Alpes and the Université Grenoble Alpes. The work, published in Environment International, also provides an estimate of the costs of pollution in urban areas: €1200 per inhabitant per year in the Lyon and Grenoble conurbations.
Reference: Which decreases in air pollution should be targeted to bring health and economic benefits and improve environmental justice? Xavier Morelli, Stephan Gabet, Camille Rieux, Hélène Bouscasse, Sandrine Mathy, Rémy Slama. Environment International doi.org/10.1016/j.envint.2019.04.07