Hyderabad: The World Population reached the mark of eight billion on November 15th 2022 at 01:29 PM (IST). World Population is referred to the total number of humans currently living. India is projected to surpass China as the world’s most populated country in 2023, according to World Population Prospects 2022, released on World Population Day (July 11). According to United Nations (UN), the global population reached seven billion in 2011.
The global population is growing at its slowest rate since 1950, having fallen under 1 per cent in the year 2020. According to the United Nations, the world’s population could grow to around 8.5 billion in 2030 and 9.7 billion in 2050. It is projected to reach a peak of approximately 10.4 billion people during the 2080s and to remain at that level until 2100. The total number of births currently (2015-2020) is 140 million per year globally and is projected to peak during the period 2040-2045 at 141 million per year. The total number of deaths is currently 57 million per year and is projected to grow steadily up to 121 million per year.
World Population Prospects 2022 stated that fertility has fallen markedly in recent decades for many countries. Currently, only two-thirds of the global population lives in a country or area where lifetime fertility is below 2.1 births per woman, roughly the level required for zero growth in the long run for a population with low mortality. The populations of 61 countries or areas are projected to decrease by one per cent or more between 2022 and 2050, owing to sustained low levels of fertility and, in some cases, increased rates of emigration.
According to the UN, the world population reached one billion for the first time in 1804 as a major change occurred in the world after the industrial revolution. It reached the two billion mark 123 years later in 1927, but only took 33 years to reach three billion in 1960. The number of elapsed years kept decreasing when it took only 14 years in 1974 to reach four billion, 13 years in 1987 to reach five billion, 12 years in 1999 to reach six billion, and 12 years in 2011 to reach seven billion.
It took only 11 years for the population to grow from seven to eight billion in 2022. More than half of the projected increase in the global population up to 2050 will belong to eight countries: the Democratic Republic of the Congo, Egypt, Ethiopia, India, Nigeria, Pakistan, the Philippines and the United Republic of Tanzania. Countries of sub-Saharan Africa are expected to contribute more than half of the increase anticipated through 2050.
“The relationship between population growth and sustainable development is complex and multidimensional,” said Liu Zhenmin, UN Under-Secretary-General for Economic and Social Affairs. “Rapid population growth makes eradicating poverty, combatting hunger and malnutrition, and increasing the coverage of health and education systems more complex. Conversely, achieving the Sustainable Development Goals, especially those related to health, education and gender equality, will contribute to reducing fertility levels and slowing global population growth”, he added.
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“This year’s World Population Day falls during a milestone year when we anticipate the birth of the Earth’s eight billionth inhabitant. This is an occasion to celebrate our diversity, recognize our common humanity, and marvel at advancements in health that have extended lifespans and dramatically reduced maternal and child mortality rates,” UN Secretary-General António Guterres had said. “At the same time, it is a reminder of our shared responsibility to care for our planet and a moment to reflect on where we still fall short of our commitments to one another,” he further added.
Global life expectancy at birth reached 72.8 years in 2019, an improvement of almost 9 years since 1990. Further reductions in mortality are predicted to result in average global longevity of around 77.2 years in 2050. Yet in 2021, life expectancy for the least developed countries was lagging 7 years behind the global average.
The COVID-19 pandemic affected all three components of population change. Global life expectancy at birth fell to 71.0 years in 2021. In some countries, successive waves of the pandemic may have produced short-term reductions in the numbers of pregnancies and births, while for many other countries, there is little evidence of an impact on fertility levels or trends. The pandemic severely restricted all forms of human mobility, including international migration.
According to the UN, in most countries of sub-Saharan Africa, as well as in parts of Asia and Latin America and the Caribbean, the share of the population at working age (between 25 and 64 years) has been increasing thanks to recent reductions in fertility. This shift in the age distribution provides a time-bound opportunity for accelerated economic growth per capita, known as the “demographic dividend”. To maximize the potential benefits of a favourable age distribution, countries should invest in the further development of their human capital by ensuring access to health care and quality education at all ages and by promoting opportunities for productive employment and decent work.
The share of the global population at ages 65 and above is predicted to rise from 10 per cent in 2022 to 16 per cent in 2050. At that point, it is expected that the number of persons aged 65 years or over worldwide will be more than twice the number of children under age 5 and about the same as the number under age 12. Countries with ageing populations should adapt public programmes to the growing numbers of older persons, including establishing universal health care and long-term care systems and improving the sustainability of social security and pension systems.
UN Secretary-General Antonio Guterres said, "Reaching a global population of eight billion is a numerical landmark, but our focus must always be on people. In the world we strive to build, eight billion people means eight billion opportunities to live dignified and fulfilled lives."
