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> The economics of solar/wind/battery are ...

Its always been my impression that the only practical use of hydrogen is as a pseudo battery to buffer energy from renewable sources. No need for expensive/dangerous transmission or fueling infrastructure if the hydrogen is stored in the same place it was generated, and then passed through a fuel cell to turn it back into juice when demand increases.



You can also use green hydrogen in place of blue hydrogen, e.g. when making ammonia.




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