The train ride from Paris to Amsterdam may not be the most scenic of European railway routes, but it's the only one capable of harnessing the awesome power of the Sun -- for two miles, at least. Yesterday, engineers in Belgium officially switched on Europe's first solar-powered train tunnel, spanning a 2.1-mile stretch of the rail line connecting the City of Lights to Mokum. The installation's 16,000 solar panels will be used to provide 50 percent of the energy needed to power nearby Antwerp Central Station and to provide extra juice for both high-speed and traditional trains. Originally developed to help protect travelers from falling trees in an ancient fo
