They argue the authorities did not take effective measures against atmospheric pollution, in particular during the very high pollution that Paris endured in December 2016.
They have since moved to the city of Orleans on doctors' advice and their health has improved considerably, says lawyer Francois Lafforgue. In December 2016, Paris was smothered in its worst winter pollution in a decade, with authorities ordering odd and even number plate cars off the roads on alternate days.
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