Below is our ranking of 17 European cities based on nine
categories of measures which can reduce soot emissions and help improve
Berlin finishes first, followed very closely by Stockholm, Copenhagen, Vienna and Zurich. All five cities reached grade B.
None of the 17 cities reached grade A, which would be over 90% of the maximum number of points. Seven cities failed with an F grade. For each category of measures, cities could be attributed ++ (very good: 5 points), + (good: 4 points), 0 (satisfactory: 3 points), - (fair 2 points), or -- fail (1 point).