Examples of exponential growth in the following topics:
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- For example, Thomas Malthus believed human populations were subject to the law of exponential growth: as populations grew, more people would be available to reproduce, and thus the rate of population growth would increase, resulting in exponential growth.
- Around the world, population growth rates have declined as new types of contraception have been introduced and as policies or economic circumstances discourage reproduction.
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- Malthus observed that, while resources tended to grow arithmetically, populations exhibit exponential growth.
- According to Malthus, the only alternative to moral restraint was certain disaster: if allowed to grow unchecked, population would outstrip available resources, resulting in what came to be known as Malthusian catastrophes: naturally occurring checks on population growth such as famine, disease, or war.
- Discuss Malthus's controversial theory on population growth, in terms of the concept of "moral restraint"
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- Much of the projected growth is expected to come from African countries where birth rates remain high.
- He proposed that, while resources tend to grow arithmetically, population grows exponentially.
- A new fear for many governments, particularly those in countries with very low fertility rates, is that a declining population will reduce the GDP and economic growth of the country, as population growth is often a driving force of economic expansion.
- Urbanization results from both industrialization (increasing efficiency among farmers) and population growth.
- The majority of world population growth today is occurring in less developed countries.
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- Models of urban growth try to balance the advantages and disadvantages of cities' large sizes.
- The growth machine theory of urban growth says urban growth is driven by a coalition of interest groups who all benefit from continuous growth and expansion.
- These actors make up what Molotch termed "the local growth machine. "
- Whether explained by older theories of natural processes or by growth machine theory, the fact of urban growth is undeniable: throughout the twentieth century, cities have grown rapidly.
- Smart growth programs draw urban growth boundaries to keep urban development dense and compact.
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- In the two and a half decades since 1980 the growth in the rate of obesity has accelerated markedly (while mirroring the growth in poverty and food insecurity rates) and is increasingly becoming a public health concern.
- Since 1980 both sit-in and fast food restaurants have seen dramatic growth in terms of the number of outlets and customers served.
- This is supported by the observation of a dip in American GDP after 1990, the year of the Gulf War, followed by an exponential increase.
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- Different rates of growth can lead to overpopulation or underpopulation, both of which have potential consequences.
- The population growth rate has been decreasing in higher income countries; however the number of people added to the global population each year continues to increase due to increasing growth rates in lower income countries.
- However, that population growth is not distributed evenly across all countries.
- Most population growth comes from developing countries, where birthrates remain high.
- Rapid population growth in Indian cities has resulted in vast slums as populations have exceeded available land and housing.
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- The world population has been growing continuously since the 14th century, but the growth rate has been decreasing in the last few decades.
- The world population growth rate was estimated at 1.1% per year as of 2011, a rate which has declined since its peak during the 1950s–1970s.
- Despite an overall pattern of growth, population trends are not even across countries.
- A new fear for many governments, particularly those in countries with very low fertility rates, is underpopulation—a state in which the declining population reduces the GDP and economic growth of the country, as population growth is often a driving force of economic expansion.
- The majority of world population growth today is occurring in less developed countries.
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- Forecasts try to estimate the rate of population growth, but this is understandably difficult to predict.
- Population growth is difficult to predict because unforeseen events can alter birth rates, death rates, migration, or the resource limits on population growth.
- Countries may also choose to undertake mitigation measures to reduce population growth.
- Any of these changes could affect fertility rates and therefore alter forecasts of population growth.
- This video uses commonly cited statistics about population growth predictions to advocate for population control.
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- Demographic transition theory outlines five stages of change in birth and death rates to predict the growth of populations.
- Demographic transition theory (Caldwell and Caldwell 2006) suggests that future population growth will develop along a predictable four- or five-stage model.
- In fact, growth rates were less than 0.05% at least since the Agricultural Revolution over 10,000 years ago.
- Population growth begins to level off.
- For countries with intermediate fertility rates (the United States, India, and Mexico all fall into this category), growth is expected to be about 26 percent.