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a. Dot map of population density This map depicts arithmetic densities and helps distinguish densely from sparsely settled regions. Identify the South Asian, East Asian, and European population clusters on the Eurasian landmass. Respectively, these clusters are home to about 25%, 23%, and 11% of the global population. Most people in the South Asian cluster live in the countryside, whereas most people in the European cluster are city dwellers. About half of East Asia’s population is rural.
c. Crowded subway In Tokyo, subway workers push people onto trains, ensuring high arithmetic densities in each subway car during the rush-hour commute.
68 CHAPTER 3 Population and Migration