Reuters: An Israeli-Russian-German venture said it had developed a safe and lightweight hydrogen tank, overcoming a significant obstacle to the mass manufacture of automobiles operated by hydrogen fuel. The venture, known as C.En, has completed a design and test programme aimed at producing the tank for use in cars, Moshe Stern, who leads the investors in the project, told Reuters on Thursday. One of the biggest hurdles to building hydrogen-powered cars has been the safe and …