“Because population growth is continuous, and a clock that ... the 2.1 live births per woman required, in theory, to keep a population stable. What will the world look like when the population ...

Click here to view the U.S. Census Bureau U.S. and World Population Clock. Here are the 10 most ... Over 80 million live in the western United States, 69 million in the Midwest, and 57 million ...