Germany will be the first country in the world to boast a zero-emission passenger train powdered entirely by hydrogen fuel. Designed by French company Alstom, and recently unveiled at the Berlin InnoTrans trade show, the innovative "hydrail" is being built for the Buxtehude-Bremervörde-Bremerhaven-Cuxhaven line in Germany's Lower Saxony region. According to developers, the train will…