The population of the United States has shifted question:
Answers
Explanation:
stimates of the United states population at the middle of the 21st century vary, from the U.N.’s 404 million to the U.S. Census Bureau’s 422 to 458 million. To develop a snapshot of the nation at 2050, particularly its astonishing diversity and youthfulness, I use the nice round number of 400 million people, or roughly 100 million more than we have today.
The United States is also expected to grow somewhat older. The portion of the population that is currently at least 65 years old—13 percent—is expected to reach about 20 percent by 2050. This “graying of America” has helped convince some commentators of the nation’s declining eminence. For example, an essay by international relations expert Parag Khanna envisions a “shrunken America” lucky to eke out a meager existence between a “triumphant China” and a “retooled Europe.” Morris Berman, a cultural historian, says America “is running on empty.”
But even as the baby boomers age, the population of working and young people is also expected to keep rising, in contrast to most other advanced nations. America’s relatively high fertility rate—the number of children a woman is expected to have in her lifetime—hit 2.1 in 2006, with 4.3 million total births, the highest levels in 45 years, thanks largely to recent immigrants, who tend to have more children than residents whose families have been in the United States for several generations. Moreover, the nation is on the verge of a baby boomlet, when the children of the original boomers have children of their own.
Between 2000 and 2050, census data suggest, the U.S. 15-to-64 age group is expected to grow 42 percent. In contrast, because of falling fertility rates, the number of young and working-age people is expected to decline elsewhere: by 10 percent in China, 25 percent in Europe, 30 percent in South Korea and more than 40 percent in Japan.
carbon emissions and becoming an “eco hero.”
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