Nice, Reims and Toulouse will have stricter standards for entering their LEZs. 

Your are only allowed to enter Montpellier with a Crit'Air sticker 4 from January 2023.

From 1 January 2023 vehicles not meeting the Crit'Air 5 minimum standard will have to pay.

From 29 August 2023 will the Ultra Low Emission Zone cover all of London.