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Those can run on methanol or synthetic fuels. For the source of carbon atmospheric carbon capture can be used.

• blackeyeblitzar 2y ago
  Isn’t atmospheric carbon capture far less inefficient and more expensive than hydrogen production?
• mschuster91 2y ago
  > Those can run on methanol or synthetic fuels. And how are these synthfuels made? They all (except of biofuel, which as I said is ethically questionable) require hydrogen as precursor, and that's my point. It's all carbohydrates, which means you need hydrogen and oxygen (these you can get from water electrolysis) and carbon (these you can get from e.g. CO2 sequestration).
  • fpoling 2y ago
    Even if hydrogen is required as a precursor for methanol production, transportation and storage (especially long-term) of methanol is vastly cheaper than hydrogen.