Population refers to the number of individuals, typically people, residing in a specific area. Governments conduct censuses to determine the precise count of residents within their jurisdiction. This term extends beyond humans to encompass animals, microorganisms, and plants, with specialized applications in fields like ecology and genetics. In ecology, population studies focus on factors like population size, density, distribution, and growth rate. These studies shed light on the dynamics between species and their environment. Population genetics examines genetic diversity within and between populations, aiding in understanding evolutionary processes and adaptation. Overall, the concept of population is crucial for analyzing demographics, ecological interactions, and evolutionary changes.
1987: World population reaches 5 billion
The global population reached 5 billion in 1987, a benchmark demonstrating considerable growth.
1993: World population reaches 5.5 billion
The global population hit 5.5 billion in 1993.
October 1999: World population reaches 6 billion
In October 1999, the UN Population Fund declared the approximate date of the world population reaching 6 billion. This came roughly six years after the population reached 5.5 billion and twelve years after hitting 5 billion.
2000: Estimate of total people born over the past 2000 years
Around 2000, researcher Carl Haub made an estimation that over 100 billion people had been born over the preceding 2000 years.
February 2006: World population reaches 6.5 billion
In February 2006, the world population officially hit 6.5 billion, according to the United States Census Bureau.
October 2011: World population surpasses 7 billion
Another estimate by the UN placed the world population exceeding 7 billion in October 2011.
March 2012: World population reaches 7 billion
In March 2012, the global population reached 7 billion, a significant increase demonstrating the continued growth of humanity.
2017: UN projections for future population growth
In 2017, The UN predicted a global population of 9.8 billion by 2050 and 11.2 billion by 2100. These projections highlight the ongoing and substantial increases in population.
November 2022: World population surpasses 8 billion
In November 2022, the world's population reached 8 billion, marking a significant milestone in human history. This represents an increase of 1 billion people since March 2012.
2050: Projected world population reaches 9.8 billion
The UN projected the world's population to reach approximately 9.8 billion by 2050, highlighting the continued population growth trend.