The documentary begins at night, Place de la République in Paris, above an air vent of the Paris metro. Equipped with a special lamp which allows fine particles to be visualized, Jean-Baptiste Renard, research director at the Laboratory of Physics and Chemistry of the Environment and Space (LPC2E) of the CNRS in Orléans, shows the particles more or less fine ones which escape through the grid. He studies pollution that is practically invisible, but which is not without consequences. The finer the particles, the deeper they penetrate into the body. Under the direction of the scientist, the team from the France 5 investigative program Vert de rage descended into the bowels of the capital to examine the air quality of the Paris metro network. Twelve journalists measured the levels of fine particle pollution in the 332 metro and RER stations and carried out an unprecedented study on the exposure of users and RATP staff to heavy metals and fine particles. Particularly harmful emissions for health, mainly caused by braking and the resulting friction between the brake disc and the wheel and between the wheel and the rail. Ventilation problems favoring the concentration of fine particles. Users suffering from chronic asthma are particularly impacted by this air pollution.
Full article (Fr) : lettreducheminot.fr