Graydon@cstross @tokensane @tuban_muzuru Leaving aside hypothesized "electron tank" versions of room temperature superconductors, synthetic shippable fuels (ammonia, methanol, that Australian liquid battery approach, etc.) have two important functions. The one that doesn't get mentioned is arbitrage between "habitable" and "efficient", since the equator isn't going to be habitable and lots of places are going to get abruptly less habitable when the hurricane-driven floods mud up the solar panels, etc.
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