Could you please help me with this question;

Scientists in the future hope to land a mannea spacecraft on Mars in order to survive on this planet problems associated with lack of air, water, food and shelter must be faced. Select 2 of these problems and describe how you think they might be overcomed.
This is what i think: (below)

I would choose to overcome the problem of food and water on Mars.
Food can be provided by
adding local mineral by products of silicon purification allows chemicals for agriculture and industry to be produced.
To provide water i would bring in heat to melt all the frozen ice to create water.
Can you critique my work.

Could you please help me with this question;
Scientists in the future hope to land a mannea spacecraft on Mars in order to survive on this planet problems associated with lack of air, water, food and shelter must be faced. Select 2 of these problems and describe how you think they might be overcomed.
This is what i think: (below)

I would choose to overcome the problem of food and water on Mars.
Food can be provided by
adding local mineral by products of silicon purification allows chemicals for agriculture and industry to be produced.
To provide water i would bring in heat to melt all the frozen ice to create water.
Can you critique my work.

Sorry for posting this twice.

On the silicon purification byproducts. You are going to need carbon dioxide, nitrogen, phosphrous, potassium, and a number of trace elements to produce food.
ON Mars, the atmosphere is mostly carbon dioxide. Nitrogen is available in the atmosphere, and could be fixed by bacteria to nitrates.
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Now you will need phospates:
http://www.mtholyoke.edu/courses/mdyar/database/
and potassium..
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