How dangerous is travelling by train? Air pollution in the Paris metro
It's a topic that is often discussed but never really solved: Air pollution in metro stations. Is it harmful to health? A recent study carried out in the Paris metro by Ile-de-France Mobilités (IDFM) and Airparif has produced a detailed overview of pollution in the metro and the Réseau Express Régional (RER) and identified three stations with worryingly high levels of pollutants.