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Air Mining - The concept of mining the upper atmosphere from orbit for fuel and air.
- Robert A. Freitas Jr. "Some Limits to Global Ecophagy by Biovorous Nanoreplicators, with Public Policy Recommendations". quote: "it is at least theoretically possible that replicators could be constructed almost solely of CHON".
- "Aerovores (Gray Dust)".
Test of paper-making