regulation of diesel cars

But there are good reasons. Based on the UBA’s preliminary data
for 2017, nitrogen dioxide (NO2) emissions in 70 municipalities exceeded the
limit value of 40 micrograms per cubic metre set in 2010. Admittedly, the
number declined by 20 compared with the previous year. Still, this is 70
municipalities too many – assuming that the limit value is well-chosen.

At measuring stations located near traffic areas, pollution was particularly high.