Reducing fine dust by driving?

This is how well modern particulate filters work: they actively reduce fine dust.

According to the German ARD magazine Plusminus, particulate filters were tested on a modern diesel car. Almost nothing but “hot air” came out of the back. Watch the report – it only takes five minutes.

The authors of the report come to some remarkable conclusions. If you listen carefully, some traffic-related environmental measures are even reduced to absurdity (in German):