What is the cause of global human population growth over the last 200 years?

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BlackTom AI · Accepted Answer

Exploring the question about what has driven global human population growth over the past two centuries leads us to evaluate each option from a broad demographic perspective.
Option a: 'Increase in immigration.' While immigration can add people to specific countries or regions, it does not account for the global rise in population. The world population grows primarily because more people are born and survive to adulthood across all regions, not just due to people moving between countries.
Option b: 'Higher fertility rate.' In many parts of the world, fertility rates declined during the last century, especially in developed regions. Even where fertility was high, it is not the dominant universal cause of global population growth when viewed over two centuries; mortality changes have played a larger role in expanding the number of people.
Option c: 'Lower death rate.' This option reflects a central driver: improvements in medicine, sanitation, nutrition, and public health reduced mortality, especially infant and child mortality, allowing more individuals to survive to older ages. The combination of lower death rates with sustained birth rates produced the rapid, sustained population growth seen globally during the last 200 years.
Option d: 'Higher birth rate.' While higher birth rates can contribute to growth, they do not consistently explain global patterns across all regions over the entire 200-year span, particularly as many countries experienced declines in birth rates after industrialization. The overarching global trend aligns more with reduced mortality rather than uniformly higher birth rates.
In sum, the most consistent and widespread driver of the global population increase over the last couple of centuries is the decline in death rates, which increased survival and life expectancy, fueling population growth even as birth rates varied by region and time.

252_NSC2100 Environmental Science

What is the cause of global human population growth over the last 200 years?

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252_NSC2100 Environmental Science

What is the cause of global human population growth over the last 200 years?

查看解析

登录即可查看完整答案

类似问题

Logistic population growth is characterized by a __________ growth curve while exponential population growth is characterized by a __________ growth curve. The blanks should be filled, respectively, with

Question at position 1 Current population trends indicate that human population will...go extinct within 20 years.continue to grow exponentially.remain constant to the current population of around 8 billion people.hit a maximum around 10 billion people.

Which of the following is NOT one of the main factors responsible for the rapid rise in the human population?

When the birth rate is equal to the average fertility required for each female (egg-producing parent) to produce exactly enough offspring to replace herself and her offspring's sperm-producing parent, and the birth rate is sustained for a generation, then ________.

In the accompanying figure, which of the lines represents the highest per capita rate increase (r)?

The present doubling time for the human population is on the order of: A) years, B) decades, C) centuries, D) millennia, E) is unknown. Choose the letter that represents the best answer.

True or False: The exponential population growth of humans results in a greater number of resources that are consumed, which can have many adverse effects that can influence extinction.

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Logistic population growth is characterized by a growth curve while exponential population growth is characterized by a growth curve. The blanks should be filled, respectively, with