According to the World Bank, ________ has 16 of the 20 most air-polluted cities on earth.
A) China
B) Brazil
C) Mexico
D) United Kingdom
E) the United States
Question 2
Age-sex pyramids are graphical representations of
A) the structure of population at a moment in time.
B) the distribution of a population over space.
C) birth rates and death rates of a country.
D) the rankings of countries around the world.
E) a hierarchy of core-periphery relationships.
Answer: A