The total number of people who have ever lived throughout human history is probably about
a. 10 billion.
b. 30 billion.
c. 60 billion.
d. 90 billion.
Question 2
If a country is thought to be on the verge of depopulation, it is probably located in
a. North America.
b. Sub-Saharan Africa.
c. South Asia.
d. Europe.