There is very little reason why most new homes aren't built with solar panels, a wind turbine or both. It should at least come as an option. It would increase the costs a little bit but if it was a standard feature the economies of scale would keep the prices down. I'd also like to see hot water tanks replaced with the heat exchanger system if what I've read about them is true.
There are so many ways for most people in the first world to live "off the grid". I don't think we've even scratched the surface of the possibilities yet on a mass scale.
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The of and to a in is I that it for you was with on as have but be they
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