Honda is getting a lot of publicity lately on a fuel cell & battery hydrogen fueled car. At first glance it may seem like a good thing but I have questions.

How safe is the 350 atmosphere storage tank? Isn't that about 5000 psi? And what happens in a closed garage if it leaks? Isn't hydrogen odor free and combustible with almost any amount of air?

The two least cost ways to mass produce hydrogen that are proven seem to be electrolysis of water with nuclear power or reduction of water with Carbon Monoxide from partially burned coal. Aside from all the toxic Carbon Monoxide as an intermediate from the coal process, what happens to all the Carbon Dioxide from the process conclusion? Do we really think it can be sequestered for thousands of years by pumping down failing Saudi oil wells?