Billowing smoke

[itchyfeet]

Written by Simon Baxter ( Brickwerks) you know it's going to be spot on.
Do your fellow human beings a favour and get it sorted particulate matter is a major health problem

[Oldiebut goodie]

Not too much of a problem with unburnt diesel - I would worry more about ground/water contamination.

[itchyfeet]

http://www.wired.co.uk/article/diesel-e ... tion-study" onclick="window.open(this.href);return false;

[Oldiebut goodie]

The clouds of unburnt cool diesel droplets fall to the ground soon after exit from the exhaust unlike the burnt pollutants which are hot and finer and rise into the air hence my comment.