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Annual world population growth peaked at 2.1% in 1968, has since dropped to 1.1%, and could drop even further to 0.1% by 2100. [1] Based on this, the United Nations projects the world population, which is 7.8 billion as of 2020 [update] , to level out around 2100 at 10.9 billion [ 64 ] [ 65 ] [ 66 ] with other models proposing similar ...
Overshoot can apply to human overpopulation as well as other animal populations: any life-form that consumes others to sustain itself. Environmental science studies to what extent human populations through their resource consumption have risen above the sustainable use of resources.
Overpopulation or overabundance is a state in which the population of a species is larger than the carrying capacity of its environment. This may be caused by increased birth rates, lowered mortality rates , reduced predation or large scale migration , leading to an overabundant species and other animals in the ecosystem competing for food ...
[12] Not only did he conclude that overpopulation was the root cause of the intensification of political and social conflict, but he also reduced traditional morality to an evolutionary product of material surplus rather than having any objective value. Nevertheless, during the Han Dynasty, the emperors enacted a large number of laws to ...
Behavioral sink" is a term invented by ethologist John B. Calhoun to describe a collapse in behavior that can result from overpopulation. The term and concept derive from a series of over-population experiments Calhoun conducted on Norway rats between 1958 and 1962. [ 1 ]
Population Control: Real Costs, Illusory Benefits is a nonfiction book by Steven W. Mosher, president of the Population Research Institute, first published in 2008. Population Control is a detailed exposition on the global effort to combat overpopulation , arguing that not only population control is immoral in many cases, but that ...
Graph of human population from 10,000 BC to 2017 AD. It shows the extremely rapid growth in the world population since the eighteenth century. The Population Bomb was written at the suggestion of David Brower, the executive director of the environmentalist Sierra Club, and Ian Ballantine of Ballantine Books following various public appearances Ehrlich had made regarding population issues and ...
Garrett James Hardin (April 21, 1915 – September 14, 2003) was an American ecologist and microbiologist.He focused his career on the issue of human overpopulation, and is best known for his exposition of the tragedy of the commons in a 1968 paper of the same title in Science, [1] [2] [3] which called attention to "the damage that innocent actions by individuals can inflict on the environment ...