Comment by kadavero

>but stricter regulation for vehicles were an additional effect

Surely car manufacturers didn't have a say, which is why US and EU emission standards look like this https://longtailpipe.com/wp-content/uploads/2015/10/us-europ... .

>same standard as gasoline ones

Well duh, let's keep diesel cars to petrol standards so that their benefits don't matter and their disadvantages are prohibitive!