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Nuclear war is an often-predicted cause of the extinction of humankind. [1]Human extinction or omnicide is the hypothetical end of the human species, either by population decline due to extraneous natural causes, such as an asteroid impact or large-scale volcanism, or via anthropogenic destruction (self-extinction), for example by sub-replacement fertility.
This is an accepted version of this page This is the latest accepted revision, reviewed on 24 December 2024. Problem of the lack of evidence for alien life despite its apparent likelihood This article is about the absence of clear evidence of extraterrestrial life. For a type of estimation problem, see Fermi problem. Enrico Fermi (Los Alamos 1945) The Fermi paradox is the discrepancy between ...
These hotspots are suffering from habitat loss and destruction. Most of the natural habitat on islands and in areas of high human population density has already been destroyed (WRI, 2003). Islands suffering extreme habitat destruction include New Zealand, Madagascar, the Philippines, and Japan. [7]
A global catastrophic risk or a doomsday scenario is a hypothetical event that could damage human well-being on a global scale, [2] even endangering or destroying modern civilization. [3] An event that could cause human extinction or permanently and drastically curtail humanity's existence or potential is known as an "existential risk". [4]
According to psychologists, possible explanations for why people believe in modern apocalyptic predictions include: mentally reducing the actual danger in the world to a single and definable source; an innate human fascination with fear; personality traits of paranoia and powerlessness; and a modern romanticism related to end-times, resulting ...
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 .
Other benefits of ceasing human reproduction that he cites include the end of abortion, war, and starvation. [21] Knight argues that "procreation today is de facto child abuse". [19] He maintains that the standard of human life will worsen if resources are consumed by a growing population rather than spent solving existing issues. [19]
Well before this time, the level of carbon dioxide in the atmosphere will be too low to support plant life, destroying the foundation of the food chains. [150] See Future of the Earth . About 7–8 billion years from now, if and after the Sun has become a red giant , the Earth will probably be engulfed by an expanding Sun and destroyed.