New York Times: For more than a year now, an enormous solar thermal power plant has been humming along in the Arizona desert, sending out power as needed, even well after sunset. The plant, called Solana, was developed by the Spanish energy and technology company Abengoa and has succeeded in meeting an elusive solar goal producing electricity when the sun is not shining and displacing fossil-fuel-based power in the grid.
With the sun going down at 6 or 7 oclock at night, all the other forms of solar production...