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Solar in the sunny USA is still relatively expensive after 40+ years, despite the fundage thrown at it haphazardly.
Lot of reasons for this...which range from conspiracy, to market demand, to whatever.
The technology of solar efficiency is increasing exponentially!
Everything from roof tiles to thin film paint applications could be a potential zero carbon footprint 40+ years from now.
It just hasn't hit the US market yet.
The sky needs to fall first.
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