World Population

Channel: rgumbrecht   |   2007/09/21
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1
World Population
World Population
::2007/09/21::
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2
Al Bartlett on the population taboo and ZPG
Al Bartlett on the population taboo and ZPG
::2009/12/08::
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3
Z.P.G. Trailer
Z.P.G. Trailer
::2008/06/19::
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4
♥ "ZPG" - Zero Population Growth
♥ "ZPG" - Zero Population Growth
::2011/10/14::
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5
A look in to the future......Zero population growth (1972)
A look in to the future......Zero population growth (1972)
::2014/01/09::
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6
Alan Watt 1of2: Eugenics and genocide -- aka
Alan Watt 1of2: Eugenics and genocide -- aka 'zero population growth'
::2010/08/03::
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7
Finance_ World Population
Finance_ World Population
::2013/09/01::
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8
Zero Population Growth
Zero Population Growth
::2008/11/02::
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9
Leftover Crack - Zero Population Growth (Life Is Pain)
Leftover Crack - Zero Population Growth (Life Is Pain)
::2009/06/14::
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10
Zero Population Growth
Zero Population Growth
::2009/06/19::
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11
Problem With Zero Population Growth.flv
Problem With Zero Population Growth.flv
::2010/03/21::
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12
Zero Population Growth Mix - The Malthusian Project
Zero Population Growth Mix - The Malthusian Project
::2012/12/27::
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13
EDICTO SIGLO XXI; PROHIBIDO TENER HIJOS (Z.P.G. Zero Population Growth)
EDICTO SIGLO XXI; PROHIBIDO TENER HIJOS (Z.P.G. Zero Population Growth)
::2013/06/07::
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14
Order of The Gash "Zero Population Growth"
Order of The Gash "Zero Population Growth"
::2011/12/01::
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15
042911-Zero Population Growth vs. Be Fruitful Multiply Economic Prosperity
042911-Zero Population Growth vs. Be Fruitful Multiply Economic Prosperity
::2011/04/29::
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16
Dr. John Tanton Topic 2: The Population Movement in the 1960
Dr. John Tanton Topic 2: The Population Movement in the 1960
::2008/05/02::
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17
Solow Model Diagram Problem - Effect of Decrease in Population Growth (per capita Capital & Output)
Solow Model Diagram Problem - Effect of Decrease in Population Growth (per capita Capital & Output)
::2012/12/08::
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18
Edicto siglo 21: prohibido tener hijos - Zero population growth (1972) critica de James Wallestein
Edicto siglo 21: prohibido tener hijos - Zero population growth (1972) critica de James Wallestein
::2012/06/20::
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19
Survival Unit - Humanflood [Zero Population Growth]
Survival Unit - Humanflood [Zero Population Growth]
::2011/04/25::
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20
"Beefcake" Part 2 from the play Zero Population Growth
"Beefcake" Part 2 from the play Zero Population Growth
::2008/07/30::
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21
Zero Population Growth
Zero Population Growth
::2010/04/09::
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22
Zero Population Growth - A Reducation of Technology-Standards
Zero Population Growth - A Reducation of Technology-Standards
::2010/09/07::
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23
Population Explosion - ECU #156
Population Explosion - ECU #156
::2007/02/19::
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24
Let
Let's Play ZPC (Zero Population Growth) for Windows Part 2
::2010/07/11::
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25
"Beefcake" Part 1 from the play Zero Population Growth
"Beefcake" Part 1 from the play Zero Population Growth
::2008/07/30::
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26
Zero population growth. #clunk4mayor
Zero population growth. #clunk4mayor
::2014/03/02::
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27
AFTERMATH  Population Zero Full
AFTERMATH Population Zero Full
::2012/09/02::
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28
POPULATION GROWTH THE SONG
POPULATION GROWTH THE SONG
::2009/06/05::
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29
Let
Let's Play ZPC (Zero Population Count) for Windows Part 1
::2010/07/11::
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30
Paul MacCready on Population Growth
Paul MacCready on Population Growth
::2007/10/08::
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31
Population ecology part 1 population growth and growth rate
Population ecology part 1 population growth and growth rate
::2013/11/13::
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32
DVAU presents: John Seager, Population Connection, January 19, 2012
DVAU presents: John Seager, Population Connection, January 19, 2012
::2013/02/19::
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33
Overpopulation is a Myth
Overpopulation is a Myth
::2011/10/03::
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34
Bill Gates Admits Vaccines Are Used for Human Depopulation
Bill Gates Admits Vaccines Are Used for Human Depopulation
::2010/02/28::
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35
Population Stabilization Efforts in India
Population Stabilization Efforts in India
::2010/06/13::
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36
VIDESCANEO 081 | Z.P.G. (ZERO POPULATION GROWT)
VIDESCANEO 081 | Z.P.G. (ZERO POPULATION GROWT)
::2012/08/27::
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37
Population ecology part 2 population growth rate
Population ecology part 2 population growth rate
::2013/11/13::
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38
Stephen Steinlight - It
Stephen Steinlight - It's about Mexicans - It's about zero immigration
::2013/01/31::
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39
Bruce Greenwald on Making Predictions in a Shifting Landscape
Bruce Greenwald on Making Predictions in a Shifting Landscape
::2012/08/31::
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40
Trialogue #15: Saving The World (Terence McKenna, R. Sheldrake, R. Abraham) [FULL]
Trialogue #15: Saving The World (Terence McKenna, R. Sheldrake, R. Abraham) [FULL]
::2011/07/08::
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41
Population Control
Population Control
::2012/04/18::
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42
Population Zero Trailer
Population Zero Trailer
::2009/06/12::
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43
International Development: Phish/Character Zero,
International Development: Phish/Character Zero, 'Population'
::2008/10/13::
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44
'Noah' Review: Darren Aronofsky's Biblical 'Waterworld' Mostly Runs Aground
::2014/03/24::
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Better, Not Bigger - Eben Fodor
Better, Not Bigger - Eben Fodor
::2010/12/14::
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Bill Gates and Hans Rosling addressing the 2012 Global Poverty Ambassadors and students at the LSE
Bill Gates and Hans Rosling addressing the 2012 Global Poverty Ambassadors and students at the LSE
::2012/02/27::
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47
Zoology and the Human Animal
Zoology and the Human Animal
::2014/02/15::
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48
One Child Only Law coming to America, Worldwide
One Child Only Law coming to America, Worldwide
::2011/05/17::
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Ticking Time Bombs: Overpopulation, Food Crisis and Environmental Degradation
Ticking Time Bombs: Overpopulation, Food Crisis and Environmental Degradation
::2012/03/14::
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50
Population Zero Film Entier Complet En Francais 2014 Vf Fr
Population Zero Film Entier Complet En Francais 2014 Vf Fr
::2013/01/26::
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RESULTS [51 .. 101]
From Wikipedia, the free encyclopedia
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Zero population growth, sometimes abbreviated ZPG (also called the replacement level of fertility),[1] is a condition of demographic balance where the number of people in a specified population neither grows nor declines, considered as a social aim by some.[2] According to some, zero population growth is the ideal towards which countries and the whole world should aspire in the interests of accomplishing long-term environmental sustainability.[3]

History[edit]

A loosely defined goal of ZPG is to match the replacement fertility rate, which is the average number of children per woman which would hold the population constant. This replacement fertility will depend on mortality rates and the sex ratio at birth, and varies from around 2.1 in developed countries to over 3.0 in some developing countries.[citation needed]

The American sociologist and demographer Kingsley Davis is credited with coining the term[4][5] but it was used earlier by George Stolnitz, who stated that the concept of a stationary population dated back to 1693.[6] A mathematical description was given by James Mirrlees.[7]

In the late 1960s ZPG became a prominent political movement in the U.S. and parts of Europe, with strong links to environmentalism and feminism. Yale University was a stronghold of the ZPG activists who believed “that a constantly increasing population is responsible for many of our problems: pollution, violence, loss of values and of individual privacy.”[8] Founding fathers of the movement were Paul Ehrlich, author of The Population Bomb, and Thomas Eisner. Ehrlich stated: “The mother of the year should be a sterilized woman with two adopted children.”

Effects[edit]

In the long term, zero population growth can be achieved when the birth rate of a population equals the death rate, i.e. replacement level is met and rate is stable. Unstable rates can lead to drastic changes in population levels. (This ignores migration, which is valid for the planet as whole, but not necessarily for a nation.) A population that has been growing in the past will have a higher proportion of young people. As it is younger people who have children, there is large time lag between the point at which the birth rate falls below the death rate and the point at which the population stops rising.[9]

Conversely, a large elderly generation can be the result of an aging “baby boom”, but if that generation had failed to replace its population during its fertile years, the result is a subsequent “population bust”, or decrease in population, as that older generation dies off. This effect has been termed birth dearth. In addition, if a country's fertility is at replacement level, and has been that way for (at least) several decades (to adjust for changes in age distribution), then that country's population could still experience coincident growth due to continuously increasing life expectancy, even though the population growth is likely to be smaller than it would be from natural population increase.

Zero population growth is often a goal of demographic planners and environmentalists who believe that reducing population growth is essential for the health of the ecosystem. Preserving cultural traditions and ethnic diversity is a factor for not allowing human populations levels or rates to fall too low. Achieving ZPG is difficult because a country's population growth is often determined by economic factors, incidence of poverty, natural disasters, disease, etc.

However, even if there is zero population growth, there may be changes in demographics of great importance to economic factors, such as changes in age distribution.

In China[edit]

China is the largest country by population in the world, being home to some 1.3 billion people. China is expected to witness a zero population growth rate by 2030. China's population growth has slowed since the beginning of this century. This was mostly the result of China's economic growth and increasing living standards which led to the decline. However, many demographers also credit China's family planning policy, which was formulated in the early 1970s, encourages late marriages, late childbearing, and the use of contraceptives, and since 1980 has limited most urban couples to one child and most rural couples to two children. Without the policy, the Chinese government claim that the country's population would be 400 million more than the current 1.3 billion people. According to the government projection, the work-age population will then drop to 870 million. The Chinese government is hoping to see the zero population growth in the future.[10]

In Europe[edit]

In Japan[edit]

See also[edit]

References[edit]

  1. ^ Zero Population Growth Organizanion. "Zero Population Growth." BookRags Staff. N.p., 2005. Web. 7 Oct. 2009. <http://www.bookrags.com/research/zero-population-growth-enve-02/>
  2. ^ Kingsley Davis (1973) "Zero population growth: the goal and the means" in The No-Growth Society, Mancur Olson & Hans H. Landsberg, eds. New York: Norton
  3. ^ Last, John M. "Zero Population Growth." Healthline. N.p., 2002. Web. 5 Oct. 2009. <http://www.healthline.com/galecontent/zero-population-growth>.
  4. ^ Davis, Kingsley (1967). "Population policy: Will current programs succeed?". Science 158 (3802): 730–739. doi:10.1126/science.158.3802.730. PMID 6069101. 
  5. ^ Kingsley Davis Obituary
  6. ^ Stolnitz, George J. (1955). "A Century of International Mortality Trends_ I". Population Studies (Population Investigation Committee) 9 (1): 24–55. doi:10.2307/2172340. JSTOR 2172340. 
  7. ^ Mirrlees, J. A. (1967). "Optimum Growth When Technology is Changing". The Review of Economic Studies (The Review of Economic Studies Ltd.) 34 (1): 95–124. doi:10.2307/2296573. JSTOR 2296573. 
  8. ^ “ZPG – A New Movement Challenges the U.S. to Stop Growing”, LIFE magazine, April 27, 1970, page 12ff
  9. ^ http://www.ditext.com/ehrlich/3.html
  10. ^ Xiang, Zhang (21 July 2009). "China expected to see zero population growth by 2030: expert". China View. Retrieved 2010-03-01. 

External links[edit]

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