scott wrote:

> Just pour hot water over the ice until it's all melted, then use the 
> wipers to clear the excess liquid.  That will keep the glass warm and 
> dry enough until you get things warmed up.  All cars are designed to 
> survive thermal shock like this, if your windscreen cracks then it would 
> have cracked anyway due to the next stone that hit it or whatever...

Sorry, the school car park doesn't have any hot water. ;-)

Actually, last night while I was laying in bed, failing to be asleep, I 
wondered about something. Every time we have frost, government vehicles 
drive out and dump many billions of tonnes of salt onto the roads.

1. What the hell does that do to the cars?

2. Where does all this salt *go* to? Is this a problem?

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