On November 15th, 2022, history was made when the global human population reached eight billion people for the first time. It had taken only 12 years for the population to grow from seven billion to eight billion, proving that there is still a massive amount of population growth.

These populations are not evenly distributed throughout the world. The overwhelming majority of people live on the Asian continent, with China and India hosting similarly large populations of roughly 1.5 billion people each. The United States is a distant third in the ranking of countries by population, at 338 million people. Indonesia, Nigeria, and Brazil are highly populated as well.

Growth rate

The world’s population is currently increasing at 0.83 per cent per year. However, this is a global average; some countries have a dramatically higher population growth rate than others.

Nigeria has a very high growth rate, at 2.4 per cent every year. Pakistan, Bangladesh, and Mexico are the runners-up. Russia and China have no net increase in population growth, despite having already large established populations.

There are a variety of reasons that can cause these variations in population growth, such as economic, legal, or political factors. For example, China’s One Child Policy has severely limited population growth within the country.

The fertility rate is usually a good indicator of where a population’s growth rate stands. It is the average number of children that will be born to a woman in her lifetime. Nigeria has an unsurprisingly high fertility rate, standing at an average of 5.14 children born to each Nigerian woman. Pakistan, Indonesia, and India are runner-ups for fertility rates.

Countries such as Brazil, Russia, and China have a fertility rate below the replacement rate. This means that two parents are not reproducing enough to completely replace themselves in future generations. This usually indicates a decreasing population in the future.

A look at life expectancy

Fertility rate and life expectancy usually have an inverse relationship. A country with a higher life expectancy usually doesn’t have a high fertility rate; in fact, the population will not be growing as rapidly because they are further along in the industrialisation process.

Also Read: Singapore’s ageing population: Tech and new scientific discoveries may calm the silver tsunami

The global average life expectancy has risen drastically from only 29 years old in 1800 to 73 years old in the present day. Countries with the highest life expectancy include Japan, Spain, and Switzerland, whose citizens enjoy full lives well into their 80s. South Sudan, Somalia, and Sierra Leone only have life expectancy for citizens into their mid-40s.

These countries have fertility rates that are much higher than countries in which the citizens live longer. Usually, average life expectancy is affected by infant mortality rates, so mothers will give birth to more children in these countries. 

The growing world population has had a wide range of effects on business. The population will continue to age as global life expectancy lengthens. Therefore, there will be a greater need for industries that cater towards the elderly population. There can be a growing demand for assisted living facilities, pharmaceuticals, and hospitals.

There might also be a labour shortage caused by the ageing population, which in turn could cause a shrinkage in global GDP. GDP will likely shift towards sub-Saharan Africa to reflect the growing labour forces in these countries. Larger populations in countries can lead to multinational corporations as well. 

The road to nine billion

This next milestone is looming close. It is predicted that it will only take 15 years to add an additional billion to our population. Some of the trends that are predicted for the near future is that Africa will become the fastest-growing continent.

It is predicted to double by 2050, while Asian population rates will slow. Europe’s population will continue to slow, with a 15 per cent population decline by 2050. This decline is mostly caused by ageing populations and much lower birth rates. Global migration will also be a dominant force, representing 3.3 per cent of all people. This is understandable, given the much more globalised world we live in today.

In conclusion

It is predicted that the global population will cap out at 10.4 billion by 2080. After that, growth rates will fall significantly, and humans will have to adapt to shifting age demographics.

There are a lot of people on the planet, and resources must be shared equitably to make sure that there is a bright future for the human race and the natural world.

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