Mars Environmental Protection: An Application of the 1/8 Principle

  • Tony Milligan
  • Martin ElvisEmail author
Part of the Space and Society book series (SPSO)


There are a number of candidate rationales for the settlement of Mars. These are considered in Sect. 10.1. At least one of them is economically plausible: its use as a base of operations for asteroid mining in the Main Belt. This rationale suggests that environmental protection on Mars needs to be considered in a broader context than that of the planet alone. More specifically, the authors argue in Sect. 10.2 that planetary environmental protection (which goes beyond ‘planetary protection’ in the stricter legal sense) is partly a matter of containment and so requires a framing principle. Section 10.3 supplies such a principle for protection, “the 1/8 principle”: while economic growth in space remains exponential and comparable to historical patterns on Earth, we should use no more than 1/8 of the available resources, in order to secure a reasonable ‘breaking distance’ before we reach a point of super-exploitation. Section 10.4 examines the difficulties of applying such a principle to Mars, the need for trade-offs and special weighting for special strategic resources such as uncollapsed lava tubes. Section 10.5 points out the ease with which the principle can be turned into policy options and its good matchup with human practices of valuing and use. The latter considerations may not be decisive, but they do count strongly in its favour.


  1. Cockell, C. S., & Horneck, G. (2004). A planetary park system for Mars. Space Policy, 20, 291–295.ADSCrossRefGoogle Scholar
  2. Cockell, C. S., & Horneck, G. (2006). Planetary parks—formulating a wilderness policy for planetary bodies. Space Policy, 22, 256–261.ADSCrossRefGoogle Scholar
  3. Conway, E. M. (2015). Exploration and engineering: The jet propulsion laboratory and the quest for Mars. Baltimore: Johns Hopkins University Press.Google Scholar
  4. Elvis, M. (2014). How many ore-bearing asteroids? Planetary and Space Science, 91, 20–26.ADSCrossRefGoogle Scholar
  5. Elvis, M., & Milligan T. (2019). How much of the solar system should we leave as wilderness? Acta Astronautica.Google Scholar
  6. Elvis, M., Milligan, T., & Krolikowski, A. (2016). The peaks of eternal light: A near-term property issue on the Moon. Space Policy, 38, 30–38.ADSCrossRefGoogle Scholar
  7. George, H. (1912). Progress and poverty: An inquiry into the cause of industrial depressions and of increase of want with increase of wealth. New York: Doubleday.Google Scholar
  8. Gladman, B., et al. (2001). The structure of the kuiper belt: Size distribution and radial extent. Astronomical Journal, 122, 1051–1066.ADSCrossRefGoogle Scholar
  9. Green, J. (2017). Making Mars livable. Accessed October 8, 2018.
  10. Jones, K. R., Klein, C. J., Halpern, B. S., Venter, O., Grantham, H., Kuempel, C. D., et al. (2018). The location and protection status of Earth’s diminishing marine wilderness. Current Biology, 28(15), 2506–2512.CrossRefGoogle Scholar
  11. Lupisella, M. (2016). Cosmological theories of value. In J. Schwartz & T. Milligan (Eds.), The ethics of space exploration (pp. 75–91). Heidelberg, London and New York: Springer.Google Scholar
  12. McEwen, A. S., Ojha, L., Dundas, C. M., Mattson, S. S., Byrne, S., Wray, J. J., et al. (2011). Seasonal flows on warm martian slopes. Science, 333, 740–743.ADSCrossRefGoogle Scholar
  13. McKay, C. P. (2013). Astrobiology and society: The long view. In C. Impey, A. H. Spitz, & W. Stoeger (Eds.), Encountering life in the universe: Ethical foundations and societal implications of astrobiology. Tucson: University of Arizona Press.Google Scholar
  14. Milligan, T. (2015). Asteroid mining, integrity and containment. In J. Galliot (Ed.), Commercial space exploration: Ethics, policy and governance. Famham: Ashgate.Google Scholar
  15. Milligan, T. (2018). Valuing humans and valuing places: “Integrity” and the preferred terminology for geoethics. Geosciences, 8(1), 25.ADSCrossRefGoogle Scholar
  16. O’Neill, G. (2001). The high frontier: Human colonies in space. Ontario: Apogee.Google Scholar
  17. Rawls, J. (1974). The independence of moral theory. Proceedings and Addresses of the American Philosophical Association, 47, 5–22.CrossRefGoogle Scholar
  18. Schwartz, J. S. (2018). Myth-free space advocacy part III—The myth of educational inspiration. Space Policy, 43, 24–32.ADSCrossRefGoogle Scholar
  19. Taylor, A., Elvis, M., & McDowell, J.C. (2018). Acta Astronautica, 146, 73–82.Google Scholar
  20. Trilling, D. E., Robinson, T., Roegge, A., Chandler, C. O., Smith, N., Loeffler, M., et al. (2017). Implications for planetary system formation from interstellar object 1I/2017 U1 (‘Oumuamua’). Astrophysical Journal, 850, L38.ADSCrossRefGoogle Scholar
  21. Tsiolkovsky, K. E. (2004). Selected works of Konstantin E. Tsoilkovsky. Honolulu: University Press of the Pacific.Google Scholar
  22. Turner, F. J. (2015). The frontier in American history. Michigan: University of Michigan.Google Scholar
  23. Zubrin, R. (2012). The case for Mars: The plan to settle the red planet and why we must. New York: Simon & Schuster.Google Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Department of Theology and Religious StudiesKing’s College LondonLondonUK
  2. 2.Harvard-Smithsonian Centre for AstrophysicsCambridgeUSA

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