Biospheres are inevitable

in the first phases of settlement

in Mars Mr Musk...

 

As is with possibly,

for the temporary measure.

Underground habitat.

 

Just until new structures

are built.  

 

But. More importantly,

setting up ways to

mine the resource there

in the most automated ways

as much as possible.

(Possibly mining by laser)

 

Any sort of metals for construction.

 

Then giant CNC.

 

 

Refining and automating these

processes will create a city

on Mars quickly.