4 ms·

OK, but they're talking about all the oxygen molecules that are in metals. And then digging 10 meters deep for the whole moon, assuming 100% can be extracted an

• roenxi 5y ago
  It is an interesting thought. Note that sand - often silicon dioxide - contains a lot of oxygen.
  • Cthulhu_ 5y ago
    And water - composing 71% of the earth - is two hydrogen, one oxygen atom. That's just the atoms of water itself, on top of that, a lot of oxygen is dissolved in the water itself. tl;dr the earth has plenty of oxygen, it's not really a problem. Other gases are though.
    • zokier 5y ago
      > And water - composing 71% of the earth Far less actually. From Wikipedia: > The total mass of Earth's hydrosphere is about 1.4 × 10^18 tonnes, which is about 0.023% of Earth's total mass
      • hutzlibu 5y ago
        He was talking about surface. 71% of the earth is covered by water.
• jacquesm 5y ago
  > Does anyone know how this compares to earth? The Earth doesn't need this because it has a breathable atmosphere, but you can just look at the oceans and ballpark figure that to about 8/10ths of their mass (the oceans, not the planet). Mars would be a better comparison to the moon.
• dotancohen 5y ago
  > Does anyone know how this compares to earth? Oxygen is the single most common element in the Earths crust.