I think there are reasonable martian terraforming timelines that take a couple hundred years. I don't think you need a dyson sphere level of energy output, or

I think there are reasonable martian terraforming timelines that take a couple hundred years. I don't think you need a dyson sphere level of energy output, or even a single millennium to terraform mars to be human habitable. It's a big project, to be sure, but if we were dedicated to it I think we could accomplish it in <1,000 years.