A reasonably decent documentary that intentionally doesn't really answer the question. I had thought all these events happened much earlier than the late 90s. It's clear what side the film maker is on, but then it's hard to have a good murder mystery without portraying the victim in a sympathetic light. The best feature of the movie was two african-american women who had electric cars; they were such fun characters! It's clear the director thinks the hydrogen fuel cell is another electric car dream, a vision on the horizon that will never come to pass, a bogeyman used to scare away actual improvements that are here now.