Recent and Future Population Growth Study Guide


Every human being born on this earth has the right to have enough resources on earth. Still, with the population reaching about 8 billion currently, many people will be left to have a low standard of life due to the earth being pushed to its ecological breaking point. Overpopulation is a sensitive issue because it brings about a lot of questions, not only about the effects it might have on the environment but also the ethical issues it might lead to.Population Projection

Population projectionSource

  • The population rate is increasing worldwide, which can be noticed when looking at the world population projections.
  • Consider the total population of the world in 2014, which stood at around 7.2 billion (with the growth rate of the population of the world in 2014 being 1.17%).
  • This is expected to increase gradually, with the world population 2030 bringing around 8.5 billion.
  • A further increase will be seen in the later years, with the population in 2050 reaching about 9.9 billion, with the expected growth rate in the world population in 2050 being 0.5%.
  • The growth rate of the world population in 2050 is expected to further reduce to 0.1% in 2100.

Here is the growth of the world population chart that can help you clearly understand the trends. This population chart of the world contains both the global growth rate and the world population in numbers.

Population projectionSource

The Effects of Overpopulation

A few common effects of overpopulation include:

1. Ecological degradation

A population increase can put pressure on the environment, leading to decreased biodiversity, increase in deforestation, emissions, and pollutions, which will result in climate change.

2. Increased conflicts

Overpopulation leads to scarcity of resources which will cause an increase in political and social conflicts. People would be fighting for basic resources, and this turmoil would increase as the population rose.

3. Higher risk of pandemics and disasters

When wildlife habitats are destroyed for human settlement, wild animals will start having contact with humans regularly, increasing the spread of pathogens and viruses.


  • In 2019, official UN population projections and estimations were prepared during the 2019 Revision of World Population Prospects by the Population division of the United Nations Department of Economic and Social Affairs.
  • Their reports have concluded that the global population is getting older due to the falling fertility levels and the increase in the life expectancy of individuals. The number of nations that will experience a fall in their population size increases.
  • These drastic changes in the distribution, size and population composition might create significant changes to the targets of improving nations’ social and economic prosperity.


1. What is currently happening to the population growth rate?

The world’s population growth rate in 2021 is 1.03%, which is around half the peak population rate of 1968- 2.09%. The current population in 2021 saw an increase of 1.03 % from the previous year (2020), which saw an increase of 1.05% from the population in 2019.

2. Is the population increasing or decreasing in 2020?

The population growth rate in 2020 was 1.05% which was lower than the growth rate of the previous years (1.08% in 2019 and 1.10% in 2018).

3. What is the projected population growth for 2020?

Population projections by the UN in 2017 were that there will be a decrease in the growth of the global population from 1.0% in 2020 to 0.5% in 2050 world population. These future predictions for the growth rate will gradually keep decreasing to reach 0.1% in 2100.

4. What are the 4 factors that affect future population growth?

Future growth of population is affected by four fundamental factors, and these are:

  • Birth rateAt any particular time, if the number of births is more than the number of deaths or if the rate of death is slower when compared to the birth rate, the population will increase globally.

  • Death rateThe mortality rate or death rate is another important factor that affects population growth. Deaths decrease the population, but with affordability and accessibility of medicines and quality health care, deaths can be lowered than the birth rates. Therefore, this increases the total population.

  • ImmigrationThe movement of people into a population from other places for better job opportunities, better health care systems, social security, better education, and more is known as immigration. When people immigrate into a country, it affects the size of the population of that specific area or nation.

  • EmigrationWhen individuals move out of a population due to increased war and conflict, lack of peace and social security, poor job opportunities or education systems, poor healthcare facilities, and more, the process is called emigration. The total population of that area declines gradually when people emigrate from a nation.

5. What are the 3 types of population growth?

The three types of population growth include:

  • Constant growth
  • Exponential growth
  • Logistic growth

6. What are the 3 factors of population growth?

The three factors that affect the growth of the population are:

  • Birth rate
  • Death rate
  • Migration

7. What is the main cause of population growth?

The main cause of global population growth is the imbalance between births and deaths worldwide. This is due to the decrease in the death rate and the infant mortality rate.

8. How can we increase population growth?

Population growth can be increased exponentially if a population is given unlimited amounts of oxygen, food, moisture, and other factors that can improve the population’s lifestyle.

9. What are two social factors that affect population growth?

The two important social factors that can influence the growth of the population include:

  • Better healthcare and access to improved medical technology
  • Economic, political, and government stability
  • Family planning education and the awareness of the importance of birth control is also a social factor that can affect the total world population.

10. What are two things that increase a population?

The two things that increase the population are:

  • Natality: Natality is the number of people included in the population over a given period due to reproduction.
  • Immigration: Immigration is the movement of a person from one area to another.

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  1. What are two social factors that affect population growth? Accessed on 2 Dec 2021.
  2. What are the 3 types of population growth? Accessed on 2 Dec 2021.
  3. Population Growth and Components of Population Growth. Accessed on 2 Dec 2021.
  4. Main Factors Driving Population Growth. Accessed on 2 Dec 2021.
  5. Population Growth Patterns.
  6. Accessed on 2 Dec 2021.
  7. Factors that affect population size and growth. Accessed on 2 Dec 2021.
  8. World Population Prospects 2019: Highlights. Accessed on 2 Dec 2021.
  9. World Population Growth. Accessed on 2 Dec 2021.
  10. Recent and Future Population Growth
  12. Accessed on 2 Dec 2021
  13. 2019 Revision of World Population Prospects. Accessed on 2 Dec 2021.
  14. OVERPOPULATION: CAUSE AND EFFECT. Accessed on 2 Dec 2021.
  15. Future Population Growth. Accessed on 2 Dec 2021.

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