Yes, but on Earth you have the option of being a bastard who pushes your problems onto other systems. On Mars you have no choice but to develop closed circular

Yes, but on Earth you have the option of being a bastard who pushes your problems onto other systems. On Mars you have no choice but to develop closed circular systems. It's harder to engineer but harder to sin, too. I have high hopes that we will figure out the engineering. I have low hopes that we will figure out how to systematically avoid temptation. I think space exploration is the best way to figure out circular systems at scale, and hopefully those lessons can be backported.