http://www.bbc.co.uk/news/resources/idt ... ar_exhaust

Touches upon the current concerns around diesel.
TL;DR - old petrol car givens out more harmful emissions than 10-year-old diesel car. Same diesel car gives out fewer harmful emissions than a new diesel car of a different brand.

I have a 2.0 diesel, but it's fairly new and meets the latest Euro standards. I imaging it's better than my old petrol though, as that think used to drink fuel.

my car exhaust is probably about 9 inches wide, it probably is very toxic and very loud If I start engine near closed businesses or too close to cars their alarms set off....