Is overpopulation a problem?
On November 15, 2022, the United Nations declared that the world's population had reached eight billion people.
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Transcript
On November 15, 2022, the United Nations declared that the world’s population had reached eight billion people.
The milestone was characteristic of the exponential population growth that has occurred in modern times.
The world’s population reached one billion people in 1800.
It would take about 130 years to double in size, to approximately two billion by 1930.
That number quickly grew to four billion by 1974, which would double again in about 50 years.
For some, this massive growth has stirred up worries about overpopulation and its consequences.
Overpopulation occurs when the number of individuals in a species exceeds the number that the environment can sustain.
The lack of resources can lead to potential consequences such as environmental destruction, resource shortages, and eventually a drastic population drop.
These fears aren’t anything new. In 1798 an economist named Thomas Malthus famously predicted that exponential population growth would lead to massive food shortages.
And in 1968 biologist Paul Ehrlich sparked widespread panic with his book The Population Bomb, which predicted mass starvation because of population growth.
Today, however, many experts aren’t too worried. Although the population has more than doubled since Ehrlich’s book was published, famine deaths have actually dropped by the millions.
According to most models, the enormous growth will eventually end, with the world’s population leveling off at about 10 or 11 billion people, as countries experience more economic development, provide more education, particularly for girls, and see declines in fertility rates.
So while this new population milestone may stir up fears of famines and resource shortages, know that these worries are not likely to occur.
The milestone was characteristic of the exponential population growth that has occurred in modern times.
The world’s population reached one billion people in 1800.
It would take about 130 years to double in size, to approximately two billion by 1930.
That number quickly grew to four billion by 1974, which would double again in about 50 years.
For some, this massive growth has stirred up worries about overpopulation and its consequences.
Overpopulation occurs when the number of individuals in a species exceeds the number that the environment can sustain.
The lack of resources can lead to potential consequences such as environmental destruction, resource shortages, and eventually a drastic population drop.
These fears aren’t anything new. In 1798 an economist named Thomas Malthus famously predicted that exponential population growth would lead to massive food shortages.
And in 1968 biologist Paul Ehrlich sparked widespread panic with his book The Population Bomb, which predicted mass starvation because of population growth.
Today, however, many experts aren’t too worried. Although the population has more than doubled since Ehrlich’s book was published, famine deaths have actually dropped by the millions.
According to most models, the enormous growth will eventually end, with the world’s population leveling off at about 10 or 11 billion people, as countries experience more economic development, provide more education, particularly for girls, and see declines in fertility rates.
So while this new population milestone may stir up fears of famines and resource shortages, know that these worries are not likely to occur.