InsideClimate: A handful of U.S. utilities have discovered they can save money by encouraging small rooftop solar projectsthe same projects utility industry leaders have insisted were too expensive and unreliable to be practical. The Long Island Power Authority [3] (LIPA) in New York, for instance, is paying developers to build solar panels on top of buildings in tiny towns that are experiencing population booms but don't have enough electric grid infrastructure to bring in the electricity they need. The pilot...