A hydrogen future? - And who benefits?

We hear increasingly of hydrogen as the fuel of the future. What are the challenges and the practical steps ahead? Engineer David Boyd has been looking into a fast-changing situation, looking at challenges and asking about solutions. He covers properties, production, storage and transportation, usage, development scenarios, and economics. Will hydrogen simply reinforce problems of energy costs or could it be developed as a means for alleviating fuel poverty in rural Scotland? Could it lead to new value-added-at-source industries like ammonia, fertiliser and indeed methanol?