And look how much electrical power is being wasted well into the hours working people are in bed, or with their children reading to them indoors. Why are all the external lights on?
I remember being on a night flight over Europe many years back, and all the town and cities, with their ring roads and interlinking motorways, looked like a cross between illuminated spider webs, and giant glowing blossoms. A quite magical view, and wish I'd had a camera at the time.
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(see what I did there?)