The year is 2036 and humanity has established a colony on Mars. There's hundreds of people there, more coming every two years, and now it's time to make the colony self-sustaining.
Now the question is: what's the availability of construction materials and other resources on Mars? A lot of people asked about production of methane and oxygen from CO2 and water to refuel rockets coming to Mars.
But what about other things, say, how would one go about making steel or aluminium or some other construction material out of available resources? How does that compare to availability of ores on Earth or the Moon?