Metro systems in French cities have up to three times as much fine particle pollution as the outside air, according to the French National agency, which says that improving air quality in public transit should be a key focus for France’s public health policy.
The Anses health safety agency looked at pollution levels in seven underground transport networks, including the Paris area metro, and the Lyon, Marseille, Lille, Toulouse, Rennes and Rouen systems, and found that fine particle pollution is “on average three times higher than in the urban exterior air”.
