New York Times: Los Angeles averages more than 300 days of sunshine a year, and it often seems as if environmentalists outnumber rattlesnakes in many parts of the sprawling city. It would seem, then, that solar energy would be a thriving local industry here. But that has never been the case, and experts cite cost as the main reason. Now, the Los Angeles Department of Water and Power, the largest municipal utility in the United States, is poised to pass a roughly 5 percent rate increase on …