Independent (UK): It’s silent, it’s pollution free, it’s nippy, and it’ll get you round town for £2,500 a year, fuel and maintenance included. So, is it the car of the future? Maybe. The developers of the hydrogen-powered Riversimple Urban Car certainly think it is, and when this new British contribution to green motoring was unveiled in London yesterday they did not spare the superlatives. The lightweight two-seater, which has a hydrogen fuel cell powering four electric motors, will cut travelling …