American Energy Policy IV: The Price of Transition

And yes, ammonia is the only answer left for transportation fuels. It can be made from air and water and ANY SOURCE of heat and electric power. If you're smart, you'll use one that has an EROI higher than 8:1. Right now that is the short list of renewables above, imported gas from cheap international sources, and coal. If you care about the environment it's a really short list.

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