Question 2: Why is Global Population increasing? What does a population pyramid show?
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As years progress, humans are constantly creating new ways to sustain life. Whether that's medicine, technology, food production, or communication, humans continuously find new ways to support themselves. However, a direct result of all these lifestyle improvements is population increase. Increased food production means more people to feed, and less that will starve. Better medicines will cure more people with disease, and lessen the amount who die from it. Technology allows people to more easily educate themselves and communicate with each other, again, providing more opportunities to survive. For example, during the industrial revolution, the world experienced a huge leap in population, due to the production of so many things that assisted the survival of many. Another example could be a new medicine, which cured a disease previously killing millions of people. Now that the disease is no longer there to kill those people, those who would have died survive. These people can then have more children, none of whom would die from said disease. Because of this, the cure of the disease increased the population. Since there isn't just one new cure for one new disease a year, and people are constantly findings ways to save more lives,
Population Pyramid
A population pyramid essentially shows the male and female percentages of a certain age group, out of the entire population in a country, city, the world. The function of a population pyramid is to show the gender-age distribution of a population across a designated area.
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What is MeansPopulation pyramids are used primarily to analyze the growth of a city/country/the world. If the bars are higher near the bottom, then that means there are more young people. If there is more bars in the center, there is more middle aged, working people. If the bars are higher near the top, then there is most likely high infant mortality rates, and there is more older people.
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Types of Population PyramidsA population pyramid has three main stages. The first is called expansive, which indicates a developing region. In this type, the bars towards the bottom are longer. It shows that there is low infant mortality, high birth rates, short life expectancies, and the population is mainly younger people. The second is where the most people are in the middle. called stationary. This shows a developed nation, with low infant mortality, longer life expectancies, as well as slow population growth. The final one has longer bars towards the top, and is called constrictive, where there are older people. Typically, this demonstrates population decline, low birth rates, and again, longer life expectancies.
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