1.   Once the change has been made, then many advantages, of course, would be found for hydrogen economy.

2.   Already there are whispers of a hydrogen economy, when the world no longer depends on fossil fuels amassed from decaying plant life.

3.   Advocates of a hydrogen economy say that unlike gasoline and other fossil fuels, with their noxious combustion byproducts, hydrogen produces nothing worse than water when it burns.

4.   Does all this mean that the hydrogen economy is really at hand?