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Beyond the Solar System, the region around another main-sequence star that could support Earth-like life on an Earth-like planet is known as the habitable zone. The inner and outer radii of this zone vary with the luminosity of the star, as does the time interval during which the zone survives.
In 1980, Friends of the Earth expanded the World Health Organization's definition of health, stating, "health is a state of complete physical, mental, social and ecological well-being and not merely the absence of disease - personal health involves planetary health" [4] James Lovelock created the term "Planetary Medicine" in 1986. [5]
As well as the cost to human life and society, there is a significant environmental impact of war. Scorched earth methods during, or after war have been in use for much of recorded history but with modern technology war can cause a far greater devastation on the environment .
The well-being of human and nonhuman life on earth is of intrinsic value irrespective of its value to humans. The diversity of life-forms is part of this value. Humans have no right to reduce this diversity except to satisfy vital human needs; The flourishing of human and nonhuman life is compatible with a substantial decrease in human ...
Although about 80 percent of humans' food supply comes from just 20 kinds of plants, [159] humans use at least 40,000 species. [160] Earth's surviving biodiversity provides resources for increasing the range of food and other products suitable for human use, although the present extinction rate shrinks that potential. [125]
The Second International Conference on Closed Life Systems defined biospherics as the science and technology of analogs and models of Earth's biosphere; i.e., artificial Earth-like biospheres. [8] Others may include the creation of artificial non-Earth biospheres—for example, human-centered biospheres or a native Martian biosphere—as part ...
"Human ecology may be defined: (1) from a bioecological standpoint as the study of man as the ecological dominant in plant and animal communities and systems; (2) from a bioecological standpoint as simply another animal affecting and being affected by his physical environment; and (3) as a human being, somehow different from animal life in ...
Understanding planetary habitability is partly an extrapolation of the conditions on Earth, as this is the only planet known to support life.. Planetary habitability is the measure of a planet's or a natural satellite's potential to develop and maintain an environment hospitable to life. [1]