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exponential growth

Human population has experienced what type of growth over past 200 years?

6.7 billion

Today, human population of how many?

1.6 million

Today, human population increases by how much per week?

9.3 billion or more

By 2050, human population of how many?

ability to spread into all areas of earth, improved agricultural techniques, improved public health

Why such rapid population growth recently?


Will human population stabilize anytime soon?

exponential growth to logistic curve

Human population is moving from what type of growth to what type of growth?

optimum sustainable population, number of people living comfortably while preparing for future generations

cultural carrying capacity

birth rate

number of live births per 1000 people per year

death rate

number of deaths per 1000 people per year

(birth + immigration) - (deaths + emigration)

Population change = (equation)

China, India, US, Indonesia, Brazil, Pakistan, Nigeria, Bangladesh, Russia, Japan

Top 10 Populated Countries

fertility rate

the average number of children woman has in her lifetime

replacement-level fertility rate

average number of children couple needs to have to replace themselves


replacement-level fertility rate for developed countries


replacement-level fertility rate for developing countries

total fertility rate (TFR)

average number of children born to a woman during reproductive years


TFR is ______ worldwide.


global TFR


current US population


this country has the highest population growth than any other developed countries (due to immigration)

ecological footprint

The fact that the US has a higher population growth than any other developed country could have a large environmental impact due to _____________.


Most developed countries expect to have declining populations by what year?

child labor, cost of raising children, availability of pension, urbanization, opportunities for women, infant mortality rate, average marriage age, availability of birth control/abortions, religious/cultural beliefs and traditions

Factors Affecting Birth and Fertility Rates

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