Fine particle pollution in the Paris metro reaches values well beyond the standards recommended by the World Health Organization (WHO) For eight months, dozens of volunteers equipped themselves with measuring tools during their daily journeys in order to establish the level of pollution. This fine particle pollution comes both from the polluted air in the streets, which ventilate the stations, and from the metro trains themselves.
The study was coordinated by Jean-Baptiste Renard, director of research at the CNRS and member of the scientific committee of the association Respire.