The hydrogen economy is a neat idea. It sounds great. It sounds clean. But it is fundamentally flawed, particularly in the transportation sector. You run an electric current through water to split H20 atoms. The hydrogen is used in a fuel cell to generate electricity. It's absurd to not capture your fuel source the first time it is created. The fuel of the hydrogen economy is electricity not hydrogen. Hydrogen serves as a middleman between the electricity from the power plant and the electricity to your cars tires. Unless fuel cells are so efficient that they create more elelctricity than what was consumed, to create the hydrogen it consumes, the hydrogen economy is a pipe dream of inefficiency and waste.