Welcome to the Zubrin AMA! As you may already know, Dr. Robert Zubrin's book "The Case for Mars" was a significant early influence on SpaceX's Mars colonization plans, and his new book, “The Case for Space,” discusses how the entrepreneurial launch revolution spearheaded by SpaceX can open up a future of unlimited possibilities. His recent IAC2019 Mars Direct 2.0 presentation presentation also generated some good discussion here on r/spacex.
That's all, folks! Dr. Zubrin has signed off for today after answering questions for 3 solid hours, and he even plans to pop back in over the next few days to answer more! Thanks again to Dr. Z and everyone else involved from the Mars Society!
Also, thank you very much to the community for doing such an excellent job with the questions! There's been some great technical discussion in here.
https://www.amazon.com/Case-Mars-Robert-Zubrin-ebook/dp/B004G8QU6U
TL;DR:
Radiation isn't *that* much of an issue.
People live in inhospitable locations.
Dust covers are a thing.