Guardian: Honolulus roofscape is being repainted in blue-black. From the flattop warehouses of Sand Island to the citys residential neighbourhoods, shiny rectangles spreading across roofing tiles are collecting the tropical sun and powering houses. It would seem like a no-brainer for sunny Hawaii, but its just since 2007 that a combination of government and utility incentives and the right economics have ushered in a real solar boom, with capacity roughly doubling each year.
Today, Hawaii leads the US...