Search results
Results From The WOW.Com Content Network
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 ...
The root problem in all but one of Diamond's factors leading to collapse is overpopulation relative to the practicable (as opposed to the ideal theoretical) carrying capacity of the environment. One environmental problem not related to overpopulation is the harmful effect of accidental or intentional introduction of non-native species to a region.
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 ...
In environmental science, a population "overshoots" its local carrying capacity — the capacity of the biome to feed and sustain that population — when that population has not only begun to outstrip its food supply in excess of regeneration, but actually shot past that point, setting up a potentially catastrophic crash of that feeder population once its food populations have been consumed ...
[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 ...
Barry Commoner argued that Ehrlich emphasized overpopulation too much as the source of environmental problems, and that his proposed solutions were politically unacceptable because of the coercion that they implied, and because they would cost poor people disproportionately.