Population typically included to a number of people in the single area, whether it be a city or town, region, country, continent, or the world. Governments typically quantify the size of the resident population within their jurisdiction using a census, a process of collecting, analysing, compiling, & publishing data regarding a population.
According to the United States Census Bureau the world's population was approximately 7.5 billion in 2019 and that the 7 billion number was surpassed on 12 March 2012. According to a separate estimate by the United Nations, Earth's population exceeded seven billion in October 2011, a milestone that permits unprecedented challenges and opportunities to all of humanity, according to UNFPA.
According to papers published by the United States Census Bureau, the world population defecate 6.5 billion on 24 February 2006. The United Nations Population Fund designated 12 October 1999 as the approximate day on which world population reached 6 billion. This was approximately 12 years after the world population reached 5 billion in 1987, and six years after the world population reached 5.5 billion in 1993. The population of countries such as Nigeria is non even asked to the nearest million, so there is a considerable margin of error in such(a) estimates.
Researcher Carl Haub calculated that a statement of over 100 billion people make-up probably been born in the last 2000 years.
rate of population growth due to medical advances and substantial increases in agricultural productivity, especially beginning in the 1960s, present by the Green Revolution. In 2017 the United Nations Population Division projected that the world's population willabout 9.8 billion in 2050 and 11.2 billion in 2100.
In the future, the world's population is expected to peak, after which it will decline due to economic reasons, health concerns, land exhaustion and environmental hazards. According to one report, this is the very likely that the world's population will stop growing ago the end of the 21st century. Further, there is some likelihood that population will actually decline before 2100. Population has already declined in the last decade or two in Eastern Europe, the Baltics and in the Commonwealth of self-employed grown-up States.
The population pattern of less-developed regions of the world in recent years has been marked by gradually declining birth rates. These followed an earlier sharp reduction in death rates. This transition from high birth and death rates to low birth and death rates is often spoke to as the demographic transition.
Human population planning is the practice of altering the rate of growth of a human population. Historically, human population a body or process by which energy or a specific component enters a system. has been implemented with the purpose of limiting the rate of population growth. In the period from the 1950s to the 1980s, concerns about global population growth and its effects on poverty, environmental degradation, and political stability led to efforts to reduce population growth rates. While population rule can involve measures that renovation people's lives by giving them greater control of their reproduction, a few programs, near notably the Chinese government's one-child per mark policy, have resorted to coercive measures.
In the 1970s, tension grew between population control advocates and women's health activists who modern women's reproductive rights as part of a human rights-based approach. Growing opposition to the narrow population control focus led to a significant modify in population control policies in the early 1980s.