It requires quite some energy to build a rocket (you know, from extracting the matter from the Earth to having something that looks like a rocket on the launchpad), and then some more to fly.
There is no such thing as "green energy": even if SpaceX only used renewable energy, a) renewables are not zero-carbon and b) renewables are not infinite, so if you use it for SpaceX, you don't use it for something else, and that something else may well be using fossil fuels.
But let's be clear: SpaceX doesn't run 100% on renewable energy. So there's that.
Then, right now it is not launching rockets everyday, but I understand that the goal is to grow a lot. Create a whole new space industry. Just like one plane does not pollute that much on its own, if you take the entire aviation sector, that starts to make a lot.
I guess my point is generally that we are facing huge problems (peak oil, biodiversity collapsing, climate change just joining the party) that will probably destroy society as we know it. I don't think that pushing a lot more with a commercial space business is a good idea.
Reusable rockets are like the 5G for mobile comms: for the same usage, it requires less energy. But 5G will enable much more usage and hence it will use much more energy than 4G. Reusable rockets getting to 10M a launch... well rich people will be able to go have dinner in space, just for fun. That's not sustainable.
That's all just degrowth narrative. We should all go back to using coal fired trains because then we might use them less. Lets use horses instead of cars, then people will travel less.
> peak oil, biodiversity collapsing, climate change just joining the party
Peak oil isn't a thing.
Rocket launch pads actually are great for biodiversity as it requires a lot of land around it without humans. And animals turns out aren't that bothered by occasional rocket launches. See the high biodiversity around Kennedy Space Center as an example.
Climate change will mostly be decided on other playing fields.
> well rich people will be able to go have dinner in space, just for fun
How about trying not hold back the space industry when that is more then 0.0X% of the the market.
Before denying the energy problem (and I am not saying that philosophically, I think we should go back to horses because it is nicer, I am just saying that we are facing a big energy problem), I would encourage you to read this book, which was a huge success in France last year:
Written by a true expert, Jean-Marc Jancovici. Just check who he is, usually engineers like him, even if they don't like the conclusion (which is that engineers tend to be part of the problem, not the solution).
There is no such thing as "green energy": even if SpaceX only used renewable energy, a) renewables are not zero-carbon and b) renewables are not infinite, so if you use it for SpaceX, you don't use it for something else, and that something else may well be using fossil fuels.
But let's be clear: SpaceX doesn't run 100% on renewable energy. So there's that.
Then, right now it is not launching rockets everyday, but I understand that the goal is to grow a lot. Create a whole new space industry. Just like one plane does not pollute that much on its own, if you take the entire aviation sector, that starts to make a lot.
I guess my point is generally that we are facing huge problems (peak oil, biodiversity collapsing, climate change just joining the party) that will probably destroy society as we know it. I don't think that pushing a lot more with a commercial space business is a good idea.
Reusable rockets are like the 5G for mobile comms: for the same usage, it requires less energy. But 5G will enable much more usage and hence it will use much more energy than 4G. Reusable rockets getting to 10M a launch... well rich people will be able to go have dinner in space, just for fun. That's not sustainable.