This presentation is really giving me bope that humanity will prevail through the coming climate crisis. But for whom are they building these privileged arks for? The super rich? Will people be hand-picked to live on these cities by they skills? A bit like how sci-fi organizes space ship arks leaving Earth. Could all of my family come along to live on these cities? What about crime and pirates? Lots of questions related to the sociological aspect of this utopian idea, which I think is technically really achievable. Just don't know if humana are ready for it.