SpaceX plans to refuel the BFR on Mars with methane and oxygen produced via the Sabatier process and electrolysis [1]. They might do the same thing on Earth, ev

SpaceX plans to refuel the BFR on Mars with methane and oxygen produced via the Sabatier process and electrolysis [1]. They might do the same thing on Earth, even if only for the bragging rights of being carbon neutral. [1] https://en.wikipedia.org/wiki/Sabatier_reaction#Manufacturing_propellant_on_Mars https://en.wikipedia.org/wiki/Sabatier_reaction#Manufacturin...