Some of you may know that my grandfather pioneered solar panels and in fact built one on his house to save on electricity. During the summer, his housepanel not only powered the air conditioning but also pumped back into the grid - the electricity company used to mail him a check every month.
New developments in China have started in the same vein - here's 66 beer bottles out on the roof for hot showers, as reported by Weird Asia, through Boing Boing.
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