The Moon Has Enough Oxygen to Sustain 8 Billion People for 100,000 Years.
The Moon contains an enormous amount of oxygen—but it isn’t floating in the atmosphere. About 45% of lunar regolith is oxygen by mass, chemically locked inside minerals and glass.
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🧪 According to an estimate by soil scientist John Grant, one cubic meter of lunar regolith contains about 1,389 pounds of oxygen. The exact amount that could actually be recovered would depend on the composition of the soil and the efficiency of the extraction process.
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🌌 The original calculation assumes that the upper roughly 33 feet of lunar regolith across the Moon could be processed and that essentially all of its oxygen could be recovered. Under those idealized assumptions, the amount of oxygen is theoretically enough to support around 8 billion people for roughly 100,000 years.
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🚀 But lunar oxygen could be valuable for more than breathing. Oxygen is also a major component of rocket propellant. Producing oxygen on the Moon could eventually reduce the amount of oxidizer that future missions would need to launch from Earth, potentially making sustained lunar operations and deeper-space missions more practical.
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⚙️ The challenge is extraction. Lunar regolith contains oxygen chemically bonded to minerals such as silicates and oxides, so it cannot simply be collected and filtered from the soil. Future systems would need to mine enormous quantities of regolith, heat or chemically process it, separate the oxygen, and store it—requiring substantial energy and industrial infrastructure.
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🔬 Scientists and space agencies are actively investigating ways to produce oxygen from lunar materials. Demonstrations and experiments have shown that oxygen can be extracted from lunar regolith or lunar-soil simulants, but producing it at the enormous scale implied by the theoretical calculation remains far beyond current lunar operations.
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Sources: Southern Cross University / The Conversation (John Grant)