What about the environmental impact of Starship? If you have multiple international flights per day that will leave a very large impact.
The summary is that yes they pollute a lot for what they are, but compared to almost any other major polluting industry (travel, freight, construction, etc) it's barely anything and won't be much of a problem for a long time.
Humanity’s famous last words. Just pass the buck down the road.
Maybe governments legislating a sliding scale of regulation or cap here would be a good idea? Like, nothing to do now, but as the industry or any one company grows in this way, regulation or emissions caps grow in that way.
However, in this case, I doubt that he's interested in flying Starships around earth any more than is required to fund the Mars adventure. If there is other funding, I'd bet nobody ever gets that 90min(?) ride from Texas to Australia
We know that making the methane isn't super-expensive, because we've already used the Sabatier process commercially to make methane from CO2. That used carbon-based fuels to get the CO2; to really go carbon-neutral it'd have to be biofuel, or we'd need to pull CO2 from the air using direct-air-capture machines.
https://en.wikipedia.org/wiki/Sabatier_reaction#Creation_of_...