Originally Posted by Tommycat
Fuel cell vehicles: Well in their defense, they can run on petrochemicals(aka gasoline) while the transition to hydrogen is in progress. When hydrogen is more readily available then they can switch them to pure hydrogen fuel cell. I wouldn't say it's neutral to failed. I would put it as "Unknown" at this point. Since we haven't developed it fully yet. Where we're at right now is the equivalent of the first IC engine. Actually probably more like the first steam engine(since the IC engine is somewhat based on the steam engine). It's more of a novelty at this point, but could produce something very effective.
Everyone should disregard Tommycat, as he clearly is the one who has no idea what he's talking about. Hydrogen is the most abundant element in nature; how could it not be readily available? Given as you need an electrolyzing unit, the question of hydrogen becoming more readily available depends upon whether there is a source of energy to power the electrolyzing unit that strips the hydrogen atoms from water molecules.
The Apollo spacecraft used fuel cells for power in the 1960's and 70's. Was it practical for that purpose? Most definitely.
Is is practical for America on a scale such as gasoline? By no means would that be likely to happen. It will likely serve a purpose that siphons excess energy on a limited scale where it otherwise would be wasted. If a wind turbine produces more excess energy than is demanded, it's wasted. Having an electrolyzing unit with energy sources like wind would allow for a more reliable and stable flow of energy from otherwise unreliable powerplants. Other methods ranged to pumping ground water into dried valleys and installing hydro electric dams.