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Human Population Growth

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on 23 September 2013

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Transcript of Human Population Growth

Current Increase Each Year
Population Problems:
South Sudan and China
Human Population Growth
Solutions
Have greater access to primary health care and family planning services
Receive a basic education, especially girls and women
Have government services that help protect them when they are sick, old or unemployed. (worldbank.org)
Awareness of environmental and social cost of overpopulation
Reducing legal immigration to sustainable levels
design by Dóri Sirály for Prezi
History
Pre-Industrial Society
Industrial Revolution
20th Century
World Population Reached:

Year Time to add 1 billion

1 billion 1804
2 billion 1927 123 years
3 billion 1960 33 years
4 billion 1974 14 years
5 billion 1987 13 years
6 billion 1999 12 years
(Annenberg Learner)
Pre-Industrial Society
Humans arrived 130,000 to 160,000 years ago
The growth of population was very slow
Many threats including, diseases and climate fluctuations causing death rates high and life expectancy short
By 1804 there were 1 billion people here on Earth
(Annenberg Learner)
In Western Europe and the U.S life expectancies were low due to infectious diseases such as typhoid and cholera (which spread rapidly), filthy conditions in early factory towns and cities, poor nutrition
(Annenberg Learner)
Industrial Revolution (Early Decades)
Health & Safety Advances
improving urban sanitation and waste removal;
improving the quality of the water supply and expanding access to it;
forming public health boards to detect illnesses and quarantine the sick;
researching causes and means of transmission of infectious diseases;
developing vaccines and antibiotics;
adopting workplace safety laws and limits on child labor; and
promoting nutrition through steps such as fortifying milk, breads, and cereals with vitamins.
(worldbank.org)
Most industrialized nations had passed through demographic transition
Health technologies transferred to other countries
Population swelled
In the late 1960s the worlds population peaked

Mid 20th Century
Current Population size of the world
The current population is 7,113,089,005 and continues to rise.
5 people are born every second and 1 person dies. (popclock.org)

Top 10 most populous countries
1. China 1,349,585,838
2. India 1,220,800,359
3. United States 316,668,567
4. Indonesia 251,160,124
5. Brazil 201,009,622
6. Pakistan 193,238,868
7. Nigeria 174,507,539
8. Bangladesh 163,654,860
9. Russia 142,500,482
10. Japan 127,253,075
(popclock.org)
U.S Population
The current population of the United States is 316,736,651 and continues to rise
A person is born every 8 seconds
A person dies every 12 seconds
One international migrant every 44 seconds
(popclock.org)
Cont.
World population growth is different in the 21st century because humans are living longer and having fewer children, resulting in older people (60+) and fewer children (0-4). Also, nearly all of the population growth will take place in urban areas and the fertility rate will continue to decline. (Annenberg Learner)
"Population growth rate (PGR) is the increase in a country’s population during a period of time, usually one year, expressed as a percentage of the population at the start of that period. It reflects the number of births and deaths during the period and the number of people migrating to and from a country" (wordblank.org).
1980-2000 population grew from 4.4 billion to 6 billion resulting around a 5 million increase each year
By 2015 another 1 billion people will be added resulting the world population to be close to 8 billion people (Annenberg Learner)
Cont.
South Sudan
China
Size of Texas
Worlds newest nation & one of the poorest
Does not have paved roads
8 million people and climbing
Hundreds of thousands of Sudan's civil war refugees returning
Classroom size is 200-300 students
Most residents remain farmers or cattle hurders
(npr.org) (Langfitt, Frank)
China is the worlds most populous country holding 1.3 billion people
Some chinese fear that the expansion of infrastructure was too fast and too expensive
China has slowed population growth by limiting urban families to 1 child
Moving a mass of people is a challenge
Magnetic levitation train
(Langfitt, Frank)
Food Production Distribution
Improvement in Public Health
Conquest of Disease
Agriculture has improved dramatically
Between 1950-1984 the amount of grain harvested worldwide increased from 631 million tons to 1.65 billion tons
Technology has a wider range of techniques
In the past 10 years the food production increased 24%
(Kinder, Carolyn)
Less than 50% of the population had access to safe drinking water before 1990.
by 1990 access to safe drinking water had increased by 75 per cent.
Providing adequate housing
Getting rid of poverty
Improving food supply
Ending malnutrition
(KInder, Carolyn)
Preventing and curing diseases
Improved knowledge about nutrition, vaccinations, better public health practices and development of new medicines
(Kinder, Caroyln. yale.edu)
Future of Population Growth
"Two modes of population growth. The Exponential curve (also known as a J-curve) occurs when there is no limit to population size. The Logistic curve (also known as an S-curve) shows the effect of a limiting factor (in this case the carrying capacity of the environment)" (Farabee, MJ).
Population Growth Curve
Consequences of Population growth
Over 1 billion people do not have enough food and safe drinking water.
Global warming is disrupting our ecosystems and threatening billions of people with dislocation.
Energy sources, from wood to oil, are becoming scarcer and harder to reach or extract.
Due to population pressures, people now live in areas that are basically unsafe. Hundred of thousands of people died in 2010-2011 because they lived on floodplains in Pakistan or by the tsunami-prone coast of Japan.These regions were sparsely populated 30 years ago. (howmany.org)

Works Cited
Annenberg Learner: Unit 5: Human Population Dynamics Section 4: World Population Growth through History. <http://www.learner.org/courses/envsci/unit/text.php?unit=5&secNum=4>

The World Bank Group: Population Growth Rate. 2001 <http://www.worldbank.org/depweb/english/modules/social/pgr/index03.html>

The Best Population Size- The Big Picture. 2009, 2010 Institute for Population Studies. Berkley, California. <http://www.howmany.org/big_picture.php>

Farabee, M.J. Population Ecology: Factors Influencing Population Growth. May 18 2010. <http://www2.estrellamountain.edu/faculty/farabee/BIOBK/biobookpopecol.html>

United States Census Bureau: The U.S and World Population Clock. September 23, 2013. <http://www.census.gov/popclock/>

Langfitt, Frank. 7 Billion and Counting: Nations Grow Populations, And Face New Problems. October 31, 2011 4:39 AM. <http://www.npr.org/2011/10/31/141808114/countries-grow-populations-and-face-new-problems>

Kinder, Carolyn. The Population Explosion: Causes and Consequences. 2013 by the Yale-New Haven Teachers Institute. <http://www.yale.edu/ynhti/curriculum/units/1998/7/98.07.02.x.html>



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