The 3 methods/laws, it probably applies to other planets as well.

 

Power options are up to you Mr Musk.

 

Either solar or (was it frozen CO2?) conversion.

 

Weigh pros and cons of these....

 

I would say, the distance it takes to mine

from frozen CO2 and carrying it back...

 

The number of transport required.

 

Conversion methods...

 

May not make it worthwhile...

 

Now I think about it. xD