On Tuesday, the world's population surpassed 8 billion, and the United Nations predicts that within a year, India will overtake China as the world's most populated nation.

Since 1950, the world's population has more than tripled, with death rates down and life expectancies rising, mostly as a result of improved nutrition, access to clean drinking water, improved sanitation, and the introduction of vaccinations and antibiotics.

World Population Growth

Human life expectancy at birth increased by almost nine years to 72 years old between 1990 and 2019, according to the UN, but people in the poorest countries died about seven years earlier than the average person worldwide because of high rates of infant and maternal mortality, war, and the HIV epidemic.

In 2021, life expectancy decreased by a year to 71, mostly as a result of the COVID-19 pandemic's consequences. However, it is anticipated that persons born in 2050 would live an average of 77 years, according to CNBC.

The world population is now rising at its slowest rate since 1950 despite the fact that humankind is greater than it has ever been due to people having fewer children. 10.4 billion people are anticipated to be in the world at its peak population in the 2080s.

Today, two-thirds of people reside in nations where women typically give birth to two children, compared to an average of five in 1950. According to the UN, the number of individuals 65 and older is anticipated to rise by 6% globally by 2050.

By 2050, the population of just eight nations-the Democratic Republic of the Congo, Egypt, Ethiopia, India, Nigeria, Pakistan, the Philippines, and Tanzania-will accounts for half of the global population growth.

China and India, with 1.4 billion each, made up the majority of the population in South and East Asia, which was the area of the globe with the two highest populations in 2022.

Even though China has the largest population in the world, India will overtake it by 2023 as its population begins to decline.

In many nations, fertility has declined in recent decades, as per ABC7 Chicago. According to the UN, two-thirds of the world's population reside in nations or regions whose lifetime fertility is below the threshold of 2.1 births per woman, which is required for a population with low mortality to see no long-term growth.

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Lower Life Expectancy in UK, US, and Canada

More than twice as many people over 65 will make up 16% of the world's population by 2050 as there are under-fives. According to the UN, nations should create universal health care and long-term care systems and enhance pension systems in order to prepare for the trend toward an aging population.

The world will also see a fundamental change in how people live, necessitating the creation of better sanitary and housing infrastructure in urban areas. By the middle of the century, 14 new megacities (cities with populations greater than 10 million) will join the 33 already in existence, bringing the total number of urban dwellers in the globe to 10 billion.

The COVID-19 pandemic and its impact on worldwide population change were also assessed in the research. Life expectancy at birth decreased to 71 years in 2021, there were temporary drops in the number of births and pregnancies in several nations, and there were significant restrictions on human mobility, including international migration.

Per Telegraph via MSN, although COVID-19 decreased life expectancy, there is evidence that advancement in Europe and North America had already stalled before 2019. For instance, life expectancy was lower than anticipated in the UK, the US, and Canada, mostly due to the rise in non-communicable diseases.

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