TL;DR Europe’s air pollution decreases at weekends and rises again during the working week. The Netherlands is the country with the highest proportion of Nitrogen Dioxide (NO2) in the air - during working days. A Car-Free-Day Saturday in Spain and Portugal did not show a significant improvement in NO2 values compared to other “normal” Saturdays.

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Philipp Gärtner

Jack of all trades, master of some.

Staff at the Federal Environment Agency

Berlin, Germany