zero population growth

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zero population growth (ZPG)

a situation in which there is no population increase during a given year because the total of live births is equal to the total of deaths.
The birth rate at which there is no net increase in population—a goal of some birth control programs—and the number of births equals the number of deaths

zero population growth

,

ZPG

The demographic equilibrium in which in a given period of time the population neither increases nor decreases, that is, the death and birth rates are equal.

zero population growth (ZPG)

a state in a population in which births equal deaths, so that overall numbers remain in a steady state. ZPG (or even negative growth) has been achieved in many Western countries where the family size is low but has, so far, proved an impossible target for most Third World countries, the state being achieved only where there is widespread use of contraceptives (see BIRTH CONTROL, DEMOGRAPHIC TRANSITION)
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2] level expected with required minimum outdoor intake flow for both zero population and design (peak) population, the controller is calibrated and outdoor air damper is adjusted to deliver the lowest required intake airflow at zero population (lowest differential C[O.
No wonder the birth rate in Japan is at less than zero population growth.
The educational work of the new organization Zero Population Growth, or ZPG, became familiar to American school children.
Others find the prospect of zero population growth pleasing.
In the context of low fertility, migration continuing around the recent average level leads to a 'soft landing' at zero population growth in about 30 years time, a pathway that the former Minister, Phillip Ruddock, described as 'not a figure that I believe would be alarming to most Australians'.
They only allowed first-born sons to marry and have children; other sons could have partners, but not children; they used abortion and infanticide to uphold their policy of zero population growth.
From this, he derives a moral norm of zero population growth, as any positive or negative rate applied universally would either over-crowd the environment or abolish humanity.
The East Central Indiana region, defined as Blackford, Delaware, Grant, Henry, Jay, Madison, Randolph, and Wayne counties, experienced zero population growth over the last decade.
Even though market expansion back home is not going to be too shabby -- no need to worry about zero population growth here -- the real business to be had is over there.
France is rapidly approaching zero population growth at a time when an ever-rising percentage of the population is nearing retirement.
Zero population growth is a very sensible policy as far as ecology is concerned, but no government will pursue it for political reasons.
Zero Population Growth, while not a support group per se, actively encourages childlessness out of concern for the environment.