Earth-bound BFR flights could be net zero emissions if SpaceX uses solar energy ... | Hacker News

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tdba on Sept 29, 2017 | parent | context | favorite | on: SpaceX: Making Life Multiplanetary [video]

Earth-bound BFR flights could be net zero emissions if SpaceX uses solar energy to generate methane from atmospheric carbon dioxide, as Musk discussed in the talk.

dwaltrip on Sept 29, 2017 [–]

How much does that cost, compared to existing methane sources? I imagine that is only viable if it is comparable in cost.

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