I love SpaceX and what they are doing with rockets and reusability, but their work is also going to exponentially increase the demand for new launches to orbit. If we are ever going to create a self sustaining city on Mars, we are also going to need more and more launches per year in order to provide supplies, materials and new tech. An increased demand of launches for new space Telescopes, internet satellites, new space stations, etc. is also going to arise.
However, if even one single rocket puts so much more Co2 into the atmosphere compared to cars, or even airplanes, and what allowed us to not worry too much thusfar was because of its extremely high cost which in turn repelled demand, how are we going to do all this in a sustainable way?
Surely, rockets and space exploration increase innovation, and innovation is what we ultimately need to also solve problems we have today here on Earth, but aren't we creating even bigger problems in the process?
p.s. How much Co2 the transportation industry (airplanes + cars) releases into the atmosphere yearly? Factories? And big container ships? How are rockets comparing to that? Does someone have some numbers ?
EDIT. How much the demand is realistically going to increase? Can we afford to become a space faring civilization, considering this increase of demand? For example, could we afford to have from 1000 to 5000 launches per year of Starship+SuperHeavyBooster, plus an hypotetical future improvement in reusability and consequent increase of launche rate from China, Russia and EU?