Zero Population Growth


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Zero Population Growth

A situation in which the number of persons born in a population equals the number of persons who die. The fertility rate necessary for zero population growth varies, but is generally between 2 and 3. Some countries concerned about overpopulation aim for zero-population growth, while others dealing with an aging population may wish to increase the growth rate.
References in periodicals archive ?
In 1996, the United Nations forecast zero population growth for the world as a whole by 2040 with population peaking at 7.7 billion, an increase of less than two billion people on a current population of 5.9 billion.
Among the programs recognized by Zero Population Growth as supportive of children's futures:
For months, ominous-looking posters have appeared on buses around Washington, D.C., with the message "Y6B." Sponsored by the group Zero Population Growth, the message stands for "Year of 6 Billion."
I think that place is really the campaign headquarters for Zero Population Growth! That's what I think."
He also assesses the major changes in the traditional extended Italian family, the spread of women's emancipation and equality, secularization, the problems associated with an aging society, a zero population growth, and sexual liberation.
A kind of zero population growth. "Tabouk Tunsilk Umak wa Abouk .
Resistance, even hostility, have long marked the attitude of Catholics toward groups like Zero Population Growth.
The "mid-size" city, for example, comes out smelling like a rose in two studies by the Zero Population Growth (ZPG) organization, which has developed "tests" for child stress and environmental stress.
(Replacement level is when couples just replace themselves in the next generation--at today's mortality rates that means an average of slightly more than two children per family--leading eventually to zero population growth.)
Assuming that a population is in equilibrium, we set [r.sub.max] with zero population growth, and we perform a normalization procedure to derive the fitness potential [ILLUSTRATION FOR FIGURE 1B OMITTED], such that
What I worry about is that when you talk about zero population growth and that sort of thing you are really talking about a sort of stopped time, where the whole process of evolution gets called into question.
A conservationist who was once president of Zero Population Growth, Tanton has built a network of more than a dozen organizations whose overlapping aims include conservation, population control, restricting immigration, and making English the official language of the United States.