<you will be able to smell the vapourised diesel but the experts tell us that it is completely harmless to health and environmentally friendly>

Somehow, I find this hard to believe.
I certainly wouldn't inhale a bunch of it.
That's what bothers me when I see all this smoke talk, it looks pretty, but don't we have enough pollution in our air already?
Can't we find a way to use water or something a little less dangerous to our health?
I think of the contrails from jets up at high altitudes.
Maybe just do it in the winter when the air is cold.
I've been to full scale airshows when the wind is blowing the wrong way, thought I was going to die choking on the fumes.
There must be a better way?