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An Astrobiological View on Sustainable Life

Author

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  • Takeshi Naganuma

    () (Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, 739-8528, Japan)

Abstract

Life on a global biosphere basis is substantiated in the form of organics and organisms, and defined as the intermediate forms (briefly expressed as CH 2 O) hovering between the reduced (CH 4 , methane) and (CO 2 , carbon dioxide) ends, different from the classical definition of life as a complex organization maintaining ordered structure and information. Both definitions consider sustenance of life meant as protection of life against chaos through an input of external energy. The CH 2 O-life connection is maintained as long as the supply of H and O lasts, which is in turn are provided by the splitting of the water molecule H 2 O. Water is split by electricity, as well-known from school-level experiments, and by solar radiation and geothermal heat on a global scale. In other words, the Sun’s radiation and the Earth’s heat as well as radioactivity split water to supply H and O for continued existence of life on the Earth. These photochemical, radiochemical and geothermal processes have influences on the evolution and current composition of the Earth’s atmosphere, compared with those of Venus and Mars, and influences on the planetary climatology. This view of life may be applicable to the “search-for-life in space” and to sustainability assessment of astrobiological habitats.

Suggested Citation

  • Takeshi Naganuma, 2009. "An Astrobiological View on Sustainable Life," Sustainability, MDPI, Open Access Journal, vol. 1(4), pages 1-11, October.
  • Handle: RePEc:gam:jsusta:v:1:y:2009:i:4:p:827-837:d:5966
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    More about this item

    Keywords

    split of water; photochemical; radiochemical; geothermal; reduction-oxidation; entropy;

    JEL classification:

    • Q - Agricultural and Natural Resource Economics; Environmental and Ecological Economics
    • Q0 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - General
    • Q2 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Renewable Resources and Conservation
    • Q3 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Nonrenewable Resources and Conservation
    • Q5 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics
    • Q56 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Environment and Development; Environment and Trade; Sustainability; Environmental Accounts and Accounting; Environmental Equity; Population Growth
    • O13 - Economic Development, Innovation, Technological Change, and Growth - - Economic Development - - - Agriculture; Natural Resources; Environment; Other Primary Products

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