WHAT ARE SOME DRAWBACKS TO USING HYDROGEN?
Hydrogen does not occur alone in nature. The amount of energy it takes to break hydrogen loose from water, means that it is not efficient to use hydrogen as a fuel. If we are using wind or solar power to create hydrogen we would be better served to simply use that power directly. Only when we have lots of extra wind or solar energy laying around (something that wont happen any time soon) would using that energy to create hydrogen be a good idea. Hydrogen is also very hard to transport, being the lightest element on earth means that its very hard to keep in a container. If you cool it down so it becomes a liquid you have to keep that container very cool. All of this takes energy. More energy currently than you will get from using the hydrogen as a fuel.
