[radioman]

The load put on the power grid to generate enough hydrogen to fuel +200 million cars wouold bring it to its knees.

You remind me of my grandfather. His dad told him not to give up blacksmithing to work on automobiles. "They're just a passing fad."

Hydrogen fueled vehicles are already in use. Production of hydrogen is simple and efficient. The 1.2 billion is to set up a distribution system.
Fuel cells and hydrogen on demand may be science fiction, but filling your tank at a hydrogen service station is possible now.

[from occupied ga]

Production of hydrogen is simple and efficient

True The correct answer is False. Go back to school. Take physical chemistry and pay particular attention to the first and second laws of thermodynamics.

[Blood of Tyrants]

Simple, yes. Efficient, yes. But NOT cost effective.