What is the population of Earth, and how has this population grown? Describe the three common measures of population growth. Compare growth in developed and less developed countries.
What will be an ideal response?
The ideal answer should include:
1. Earth's population: 7.6 billion
2. Slow growth in much of human history, but rapid growth over past 300 years
3. Total birth (or fertility) rate: The average number of children born to a woman during her lifetime
4. General birth (or fertility): The number of children born per 1,000 women ages 15-44 (some countries use 49 as the cutoff age)
5. Crude birth (or fertility) rate: The number of children born per 1,000 of the population
6. Population growth occurs unevenly around the world
7. Less developed countries: LDCs contain about 81 percent of the world's population; in many countries population growth exceeds 2 percent; many people of childbearing age
8. Developed countries: Slow or negative rates of population increase; large elderly population and smaller number of people of childbearing age
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