Hydrogen fuel cells: do hydrogen cars have a future?

Hydrogen is the most abundant element on the planet, and having powered engines as long ago as 1807, it’s also the cleanest kind of fuel there is. However, hydrogen hasn’t really taken off in the world of motoring. Lots of manufacturers have experimented with the technology, and while some have committed to producing hydrogen-powered vehicles in small numbers, mass uptake still looks a long way off. If it ever happens at all.
Meanwhile, the sales of electric cars continue to ris