Swiss Low Emission Zone explained
Switzerland also has to deal with air pollution. But it does not have to adhere to the EU's specifications. Instead, it has declared a much stricter limit value for particulate matter to be binding. It is not the European 40 µg/m³ that applies in Switzerland, but 30 µg/m³, which must be adhered to. Because this does not always work, there is an environmental zone in Geneva and the surrounding towns of Carouge, Cologny, Lancy and Vernier.