clipped from: www.newscientist.com 
A concept car that attempts to sidestep the three main hurdles to the dream of hydrogen-fuelled highways was unveiled in London, UK, today.
Like other hydrogen cars, the Riversimple Urban Car (RUC) is powered by a fuel cell that combines hydrogen with oxygen from the air to release energy and nothing more toxic than water.
Its makers claim that by starting from scratch to build a small, efficient car they can make it commercially viable more quickly than the major auto manufacturers experimenting with adapting more conventional cars to hydrogen. Honda predicts its FCX Clarity hydrogen car will enter mass production in 2018, but Riversimple is aiming to lease its first fleet in 2011 and mass produce in 2013.