I wonder if in 20 years comedians will joke about the coming of the hydrogen economy the way they now joke (in the US) about the coming of the metric system. For about the last decade I have been reading about hydrogen fuel cell cars as if they were just around the corner. General Motors fatefully decided to pursue hydrogen fuel cell cars rather than developing hybrid or batter technology. In 2003 G.W. Bush announced a 1.2 billion dollar initiative to develop the technology. In California Govern