A promising source of energy, but the technology needed to make this happen is at least 3 decades off. First you need to find a way to extract and transport the hydrogen in bulk, and then you have to build the fuel cells. Government policy is completely reversed on this one; they want to develop the fuel cells before they even figure out how to harness hydrogen as a fuel source. Essentially you want to know how hydrogen works before you develop the actual product. Remember the Hindenburg? Hydrogen is a very combustible and unstable element that may not be a logical source of fuel in the final analysis. One way or another, it's quite a difficult challenge to develop hydrogen as an alternate fuel, that's why the government chose to take on the relatively easy part of developing fuel cells first. But this is a corner that can't be cut if we want to make hydrogen fuels a reality. We simply don't quite know yet whether or not hydrogen will be able to compete with other alternate fuels in terms of feasibility and cost, like biomass and ethanol.
