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The respiratory and cardiovascular systems work in tandem to provide oxygen to the body's cells.
Rusting is a chemical reaction that iron undergoes involving water and oxygen. There is no pxygen or liquid water on the moon, and therefor nothing for the iron to react with.
As far as i know there is no green metals. The green hue comes from copper and pxygen reacting and becoming copper oxide, which has a green tint (like the statue of liberty