ratp
data available at:
https://data.ratp.fr/explore/dataset/qualite-de-lair-mesuree-dans-la-station-chatelet/
and
Quick plot of ratp (Paris Public Transportation) openly available data
data available at:
https://data.ratp.fr/explore/dataset/qualite-de-lair-mesuree-dans-la-station-chatelet/
and
Quick plot of ratp (Paris Public Transportation) openly available data