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Zero population growth, sometimes abbreviated ZPG, is a condition of demographic balance where the number of people in a specified population neither grows nor declines; that is, the number of births plus in-migrants equals the number of deaths plus out-migrants. [1]
Population Connection was founded in 1968 under the name "Zero Population Growth" or ZPG by Paul R. Ehrlich, Richard Bowers, and Charles Remington in the wake of Paul and Anne Ehrlich's influential but controversial book The Population Bomb. The organization adopted its current name in 2002.
Population momentum impacts the immediate birth and death rates in the population that determine the natural rate of growth. However, for a population to have an absolute zero amount of natural growth, three things must occur. 1. Fertility rates must level off to the replacement rate (the net reproduction rate should be 1). If the fertility ...
Zero population growth, a condition of demographic balance where population remains constant over time; Zero Population Growth, the former name of the organisation Population Connection; zpg, the ISO 639-3 code for the Guevea De Humboldt Zapotec language; Z.P.G., a 1972 science fiction film
Stage one ("Premodern traditional society"): This is before the onset of urbanization, and involves little to no migration, while natural increase rates are about zero. Mobility (nomadism) is high, but migration is low. The high mortality of pre-modern societies compensates for higher fertility and slow population growth. [2]
Zero growth or no growth may refer to: . Degrowth, a political, economic, and social movement based on ecological economics, anti-consumerist, and anti-capitalist ideas; Steady-state economy, an economy consisting of a constant stock of physical wealth (capital) and a constant population size
Z.P.G. (short for "Zero Population Growth") is a 1972 Danish-American dystopian science fiction film directed by Michael Campus and starring Oliver Reed and Geraldine Chaplin. It was inspired by the best-selling 1968 non-fiction book The Population Bomb, by Paul R. Ehrlich.
Population decline, also known as depopulation, is a reduction in a human population size. Throughout history, Earth's total human population has continued to grow; however, current projections suggest that this long-term trend of steady population growth may be coming to an end.