7th grade history - How does the growth of the world's population today compare with its growth 100 years ago? Explain why the changes have taken place.
https://ourworldindata.org/world-population-growth/
https://en.wikipedia.org/wiki/World_population
Why? Fantastic medical advances.
Actually, it's pretty complicated and has to do with medical advances that help people live longer compared to lower birth rates. This is a paper that may be "over your head", but the introduction/summary may help you.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2781829/
https://ourworldindata.org/wp-content/uploads/2013/05/updated-World-Population-Growth-1750-2100-768x538.png
note on this graph, in 1959 oral birth control pills were invented, and by 1960 were widely available.
That's why my last child was born in 1958. <g>
Yes, birth control has much to do with it. Families are smaller now than they were 100 years ago, or even in the 1950s. Women work outside the home more now than in the past, so want smaller families to take care of. And if family size can be controlled instead of just happening, a family's economic well-being is a factor. Children are expensive to raise, and some couples don't want four or more children to raise, but are happy with one or two.
To compare the growth of the world's population today with its growth 100 years ago, you can gather data on both time periods and analyze the trends. Here's how you can proceed:
1. Research population data: Begin by collecting information on the world's population from a reliable source, such as the United Nations or the World Bank. Look for data that provides estimates or actual figures for both time periods – the present day and 100 years ago.
2. Calculate the growth rates: Once you have the relevant population figures, you can calculate the growth rates for both time periods. To determine the growth rate, use the following formula:
Growth rate = [(Present population - Past population) / Past population] x 100
Apply this formula to find the growth rate for each time period separately.
3. Compare the growth rates: After calculating the growth rates, compare the rate of population growth today with that of 100 years ago. You can express this as a percentage or simply compare the numerical values.
Now, let's discuss why the changes in population growth have occurred:
1. Decline in mortality rates: One significant reason for the increase in population growth is a decline in mortality rates. Improved healthcare, access to medical services, vaccinations, and advancements in medical technology have contributed to reducing the number of deaths worldwide.
2. Better living conditions: Over the past century, there have been improvements in living conditions such as access to clean water, sanitation, and nutrition. These advancements have reduced the spread of diseases and improved overall quality of life, leading to higher population growth.
3. Agricultural advancements: Technological advancements in agriculture, such as the Green Revolution in the mid-20th century, have increased food production. This has helped sustain larger populations by ensuring an adequate food supply.
4. Economic development: As economies have grown and poverty rates have reduced, families have been able to provide better care and resources for their children. This has led to increased birth rates, contributing to population growth.
5. Cultural and social factors: Cultural and social factors also influence population growth. Some regions or communities may have cultural or religious beliefs that encourage larger families, resulting in higher birth rates.
Remember, this answer is a generalization, and specific factors may vary depending on the region or country in question.