The United Nations Population Division estimates that the world's population reached 8 billion on November 15, 2022. 

The 8 billion figure is an estimate, as there is no real-time census of everyone alive on Earth at every given moment. 

The population is forecasted to peak at 10.4 billion in the coming decades, driven by increases in life expectancy and decreases in child mortality. 

Asia and Africa contributed significantly to the population growth, and they are expected to drive the next billion in 2037, while Europe's contribution will be negative due to declining population. 

The US Census Bureau suggests that the global population exceeded 8 billion on September 26, but the United Nations estimated the milestone 10 months earlier, declaring November 22, 2022, as the "Day of 8 Billion." 

The article raises questions about whether 8 billion people are too many or too few. 

The world population reached 7 billion in 2011, and it is estimated to peak at 10.4 billion in the 2080s until 2100. 

The milestone has implications for demographics, immigration, climate, and the environment, and the challenges faced by eight countries forecasted to account for half the world's population are explored. 

The bureau estimates the global population exceeded the threshold Sept. 26, a precise date the agency said to take with a grain of salt. 

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