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Hydrogen is usually produced from natural gas ("brown hydrogen", see https://en.wikipedia.org/wiki/Hydrogen_economy#Color_codes https://en.wikipedia.org/wiki/Hy

• mytailorisrich 5y ago
  That's one of the methods, not the only one. The point remains that a launch is zero emission because of the fuel used. In turn it is perfectly possible to produce that fuel 'cleanly'. I mentioned this because I thought that this was interesting as, IMHO, it shows that space launches are not necessarily ultra polluting.
  • wumpus 5y ago
    Yes, the Wikipedia article I referenced had 7 different methods of producing hydrogen. Of which 1 is popular now, the one that uses natural gas. Is any hydrogen-using rocket currently fueled with something other than hydrogen from natural gas? I totally get that it's interesting that it's possible that rocket launches might not be ultra polluting someday, but so far, ...