Approximately how long did it take for the human population to reach 1 billion?
A) more than 100,000 years
B) more than 1 million years
C) more than 2 million years
D) more than 5 million years
E) more than 10 million years
Correct Answer:
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Q2: The ecological footprint is an attempt to
Q3: Which of the following would result in
Q4: If we examine the standard of living
Q5: You are interested in reducing the overall
Q6: In general, what is the relationship between
Q8: Energy use by individuals varies among countries
Q9: Examine Figure 49.2 below. According to this
Q10: An individual's ecological footprint is equivalent to
Q11: Figure 49.7 shows observed temperature changes versus
Q12: Scientists increasingly refer to the modern era
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