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.

PDF

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?