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President Bush has already allocated approximately $2 billion in hydrogen highway research. California Governor Arnold Schwarzenegger is pushing to get 200 hydrogen filling stations built by 2010 stretching from Vancouver, British Columbia, all the way down to Baja, California. Since Californians buy one-fifth of the nation’s cars, the new hydrogen car technology could simply replace the current gasoline engine automobiles in what is called “disruptive technology” where something so innovative comes along it simply replaces the old technology very quickly.

Then again, a more likely scenario is that dual-fuel automotive systems will be developed that can run on either gasoline or hydrogen as the hydrogen infrastructure is being developed. The conversion from gasoline-powered internal combustion engines to hydrogen powered combustion engines is agreed upon by most scientists and engineers to be a particularly easy transition and would buy time for hydrogen fuel cell cars to be fully adapted.

But, hydrogen cars are not isolated to those that burn the fuel in internal combustion engines. There are more hydrogen fuel cell cars being built currently than any other kind. Let’s also not forget about hydrogen-on-demand vehicles that are either using a hydrogen compound or electrolyzing water to create hydrogen, avoiding the compressed or liquid hydrogen refueling scenario altogether. And, what about adapting hydrogen peroxide for fuel in car since it is currently being used in racecars and jet packs as a propellant?