There is a push develope fuel cell technology and hydrogen power for transportation, ie cars. Where do you think the electricity to extract H2 from H20 or methane will come from?
Then you are back to burning fossil fuels to produce electricity, and then to produce H2, which will then be converted to electricty again to drive car motor.
It's easy to see that with each conversion there are inherent inefficiencies and energy is lost. If you are using fossil fuels to produce the electricity, it would be much more efficient to just burn the fuel in the cars engine to extract its energy in one step.
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There is a push develope fuel cell technology and hydrogen power for transportation, ie cars. Where do you think the electricity to extract H2 from H20 or methane will come from?
Then you are back to burning fossil fuels to produce electricity, and then to produce H2, which will then be converted to electricty again to drive car motor.
It's easy to see that with each conversion there are inherent inefficiencies and energy is lost. If you are using fossil fuels to produce the electricity, it would be much more efficient to just burn the fuel in the cars engine to extract its energy in one step.