Vapour....trails that is

[aardvark]

On a cold day, my car leaves a vapour trail, even when it's moving slowly. The vapour tends to drift upwards though.

This is something so obvious to people living in northern climates, that we barely even think about it. In the middle of winter, at temperatures around -20 to -35 C (or colder :evilgrin: ) morning rush hour traffic produces dense ice fogs that often don't disapate until 10:30/ 11:00 AM.

[aardvark]

Until the sun burns it off. The car vapour trails do not last long but disperse adding to the general fog levels. You do have a kind of condensation giving a fairy like frosting on trees, ushes and powerlines. (even the prostitues get 'hoarfrost') :-D