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Overpopulation
Estimates of Most Populous Countries
in 2025
Twelve most populous countries in 2025 (estimated populations in milli ons)
Country 1950 1995 2025 Ratio*
India 358 976 1533 4.3
China 555 1255 1516 2.7
Pakistan 39 148 357 9.2
United States 159 274 347 2.2
Nigeria 33 122 338 10.2
Indonesia 80 207 318 4.0
Brazil 54 165 243 4.5
Bangladesh 42 124 218 5.2
Ethiopia 18 62 212 11.8
Iran 17 73 170 10.0
Mexico 28 96 154 5.5
Russia 102 147 114 1.1
_______________________________________________________________________
Source : Data fro m Wor ld Resource s 1996-97, Wor ld Resource s Institute.
*Ratio 2025 to 1950
Ratio* = 2025:1950
Regional
Population
Distribution for
People Under
Age 15
Fertility Rates USA
The Demographics of Life
USA Source
www.populationconnection.org/Communications/demfacts.
World
284.5 million Population, Mid 2001 6.1 billion
77 Population per square mile 118
15 Births per 1,000 people 22
9 Deaths per 1,000 people 9
2.1 Total fertility rate 2.8
21 % of pop under age 15 30
13 % of pop over age 65 7
The Demographics of Life
USA World
49 Births per 1,000 women
aged 15-19
50
7.1 Infant deaths per 1,000 live
births
56
$29,240 GNP per capita (PPP) $6,300
995 kCal Avg daily per capita calories
from animal products
441 kCal
66 Grains fed to livestock as %
total grain consumption
3
The Demographics of Life
USA World
19,674 kg Annual per capita carbon
emissions
4,157 kg
5 % energy consumption from
renewable sources
14
1 % female labor force in
agriculture
52
4 % male labor force in
agriculture
46
1,484 Tractor per 1,000
agricultural workers
20
Estimates of Most Populous Countries
in 2025
Twelve most populous countries in 2025 (estimated populations in milli ons)
Country 1950 1995 2025 Ratio*
India 358 976 1533 4.3
China 555 1255 1516 2.7
Pakistan 39 148 357 9.2
United States 159 274 347 2.2
Nigeria 33 122 338 10.2
Indonesia 80 207 318 4.0
Brazil 54 165 243 4.5
Bangladesh 42 124 218 5.2
Ethiopia 18 62 212 11.8
Iran 17 73 170 10.0
Mexico 28 96 154 5.5
Russia 102 147 114 1.1
_______________________________________________________________________
Source : Data fro m Wor ld Resource s 1996-97, Wor ld Resource s Institute.
*Ratio 2025 to 1950
Ratio* = 2025:1950
World Population
While demographic transition is occurring in many
places, the world population keeps increasing at a
rate of about 1.5% to 2% per year.
Doubli ng times at various compound interest ra tes
Annual % Increase Doubli ng Time (years)
0.1 700
0.5 140
1.0 70
2.0 35
5.0 14
7.5 9
10.0 7
100.0 0.7
So the doubling rate
is between 35 and 46
years!
World Population Growth
What will this mean for the planet?
Will we alter the human carrying capacity by our
impact?
What can we do to help stabilize the world’s
population?
What should we do?
Consumption Comparisons
One quarter of the global population living in developed
countries consumes for 80% of the world’s total energy.
USA alone accounts for 6% of the global population , but
consumes 30% of its resources.
20% of the global population consumes 70% of its material
resources and possesses 80% of the wealth. The majority
of this 20% in centered in Canada, USA, Saudi Arabia,
Australia, and Japan.
Consumption Comparisons
A child born today in the United States will by the age of
75 years produce 52 tons of garbage, consume 10 million
gallons of water and use 5 times the energy of a child born
in the developing world.
The United States uses approximately one quarter of the
world's fossil fuels and is the largest contributor of carbon
dioxide, undesirable combustion products, and
chlorofluorocarbons, chemicals that contribute to
greenhouse warming and attack the Earth's ozone shield.
Consumption Comparisons
Increasing the fuel mileage of cars by just 3 mpg would save
the same amount of oil that could be tapped from the Arctic
National Wildlife Refuge over 10 years.
Every 20 minutes, the world adds another 3,500 human lives
but loses one or more entire species of animal or plant life - at
least 27,000 species per year.
Population is growing faster than food supplies in 64 of 105
developing countries. Overcultivation, primarily due to
population pressures, has degraded some 2 billion hectares of
arable land - an area the size of Canada and the United States
combined
Globally, the demand for fresh water exceeds the
supply by 17 percent already. Two-thirds of the
world's population will experience some form of a
severe water shortage in the next 25 years.
By 2025, when world population is projected to
reach 8 billion, 48 countries with a total population
of 3 billion will face chronic water shortages. In 25
years, humankind could be using over 90 percent of
all available freshwater, leaving just 10 percent for
the rest of the world's plants and animals.
Consumption Comparisons
What is the Carry Capacity of the
Planet for Humans?
Paul Erlich – Population Bomb, 1968 – predicted 2
billion. Now at 6 billion.
Julian Simon – there is no problem, more people
means more potential technology solutions.
Some estimate 20 billion will be maximum (at this
rate, in your lifetime!!!)
Solution = balance of population controls and
consumption controls.
What Should We Do?