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The world population has surpassed 8 billion, with longer lifespans compensating for declining birth rates. The U.S. Census Bureau reported that global population growth is steadily decelerating, taking 12.5 years to reach 8 billion and estimated to take 14.1 years to reach 9 billion. The highest total fertility rate (TFR) countries are all in Africa. Some countries with large populations have not conducted a census for years, contributing to uncertainty about the exact timing of reaching 8 billion. There are concerns about the declining U.S. population due to deaths exceeding births, prompting discussions about immigration and incentives for American families to have more children.
