Is it feasible to break rock into core components?

In the near future, the last of the human race has been forced to retreat underground due to extreme global warming or some solar flare event.

Vertical hydroponic farms provide the food for the survivors, but do not produce enough oxygen for breathing.

The three most abundant minerals in the earth's crust are:

1. Oxygen
2. Silicon
3. Aluminum

Oxygen composes around 460 000 molecules out of every million (ppm). This is around 46%. Assuming that the survivors have had time to prepare for the apocalypse, and have a state of the art facility in which to work.

Would it be feasible for us to extract the bare elements from the crust?

posted over 8 years ago

QuiquÈ…‭

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