[gpm]

> I really wish someone would build one of these on Earth. It would actually be easier because you’d just set the pressure high enough to resist wind loads. You could make an incredibly gigantic greenhouse in some otherwise inhospitable climate

This would require 2atm pressure (to be equivalent to mars) - how well do humans react to that sort of pressure for long periods of time?

[DarthGhandi]

Humans do remarkably well at high pressures. 2 atm pressure is the equivalent of being 10m underwater.

If you go a lot higher you run into some issues and need to modify the gas composition/ratio, this has been thoroughly studied for diving purposes.