According to the United Nations, the world's population could reach eight billion by the end of the year, with India replacing China as the world's most populous country in three years.

Implications for China's aging population are also included in the report. With strict childbearing policies that appear to have overshot their goal, it could soon start declining and create demographic challenges for the world power.

Up and Down

According to the UN, the world's population will reach a peak of around 10 billion in 60 years, and then go down to around 9 billion in the next two decades.

More than half of the increases will be driven by just eight countries. Sub-Saharan Africa will contribute more than half of the world's population increases.

According to the report, by the year 2050, there will be as many women as men. The world's population was made up of men.

For the first time since 1950, the global growth rate dipped under one percent in the first year of the global epidemic.

That's just the beginning of what's to come. There will be a projected decrease in the number of people in 61 countries over the next two decades.

Nigeria, Pakistan, and Indonesia are projected to become the most populous countries by the year 2050.

Mixed Messages

There are some serious implications of the announcement. Despite the fact that we are staring down the barrel of a climate crisis of disastrous proportions, more people are able to live healthier lives.

The UN Secretary General said in a statement that "this is an occasion to celebrate our diversity, recognize our common humanity, and marvel at the improvements in health that have extended lifespans and dramatically reduced maternal and child mortality rates."

"Achieving a global population of eight billion is a landmark, but our focus must always be on people," he said. Billions of people means billions of opportunities to live dignified and fulfilled lives.

China's population is about to start actively Shrinking, according to data.