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How many people live on the Earth?
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Evolution
How long did it take for the world population to double in size?
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Evolution
How fast is the population growing?
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Evolution
Which countries lead the world in child poverty?
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Evolution
Which country has the world’s highest population density?
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Evolution
What is a census?
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Evolution
What was the baby boom?
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Evolution
Are there an equal number of boy and girl babies born?
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Evolution
