I think hydrogen will be the fuel of the future because it is the earth's most common element and can be made from a wide variety of natural elements. It can be used to make electricity to run cars through a fuel cell, or it can even fuel an internal combustion engine. Also it would be good, since it doesnt pollute the air, it just produces water vapor. Even though there is not any vehicles that are available to run on hydrogen yet, manufaturers say it is the fuel of the future.