scott wrote:
>> Hmm, in broad daylight I don't notice cars any quicker if they have 
>> their lights on but I guess I can't speak for everyone.
> 
> It still amazes me how some people *don't* notice a car approaching from 
> behind.  I don't know about everyone else, but when I see something 
> moving out of the corner of my eye it gets my attention.  Then it's 
> blatantly obvious when they suddenly see you :-)
> 
>> As for the waste, well, I am speaking as an owner of a 1.1L tiddler 
>> whose idling engine pitch significantly alters when the lights go on! 
>> :-) Even so, 0.1% of 30 years of petrol multiplied by the number of 
>> car owners and all that...
> 
> ...comes to 0.1% :-)  I'm sure that far more is "wasted" by other 
> methods, like air-con, going too fast, having your windows open, 

Going too fast is probably the big one - I'm amazed at the difference in 
fuel consumption when I cruise even 5 mph faster over a long distance. 
Air-con must be another shocker, especially in the States. Of course, in 
my case, windows open and air-con are the same thing... :)

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