On Sep 20, 11:59*am, Andy Burns wrote:
The Natural Philosopher wrote:
The one that is left is Diesel particulates. Very nasty, very carcinogenic.

For Euro 5 compliant cars with a particulate filter, how much is the
volume of particulates reduced?

There are "cats" for diesel engines too now. Still beset with
technical problems.

http://en.wikipedia.org/wiki/Catalyt...Diesel_engines
http://en.wikipedia.org/wiki/Catalyt...gative_aspects